[llvm][Docs] Add release note about LLDB core file improvements

[labath]

No description provided.

[DavidSpickett]

LGTM

[llvm-ci]

LLVM Buildbot has detected a new failure on builder flang-aarch64-out-of-tree running on linaro-flang-aarch64-out-of-tree while building llvm at step 7 "build-flang-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/53/builds/10832

Here is the relevant piece of the build log for the reference

Step 7 (build-flang-unified-tree) failure: build (failure)
0.055 [35/1/1] Generating VCSVersion.inc
2.304 [33/2/2] Building CXX object lib/Common/CMakeFiles/FortranCommon.dir/Version.cpp.o
2.372 [30/4/3] Linking CXX static library lib/libFortranCommon.a
3.959 [26/7/4] Linking CXX executable bin/f18-parse-demo
6.704 [26/6/5] Linking CXX executable bin/fir-lsp-server
9.180 [26/5/6] Linking CXX executable bin/tco
9.229 [26/4/7] Linking CXX executable bin/fir-opt
166.604 [26/3/8] Building CXX object lib/Semantics/CMakeFiles/FortranSemantics.dir/resolve-directives.cpp.o
FAILED: lib/Semantics/CMakeFiles/FortranSemantics.dir/resolve-directives.cpp.o 
/usr/local/bin/c++ -DFLANG_INCLUDE_TESTS=1 -DFLANG_LITTLE_ENDIAN=1 -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/build_flang/lib/Semantics -I/home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/flang/lib/Semantics -I/home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/flang/include -I/home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/build_flang/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/mlir/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/build_llvm/tools/mlir/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/llvm/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/build_llvm/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/clang/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/build_llvm/tools/clang/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror -Wno-deprecated-copy -Wno-string-conversion -Wno-ctad-maybe-unsupported -Wno-unused-command-line-argument -Wstring-conversion           -Wcovered-switch-default -Wno-nested-anon-types -O3 -DNDEBUG -std=c++17   -D_GNU_SOURCE -D_DEBUG -D_GLIBCXX_ASSERTIONS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT lib/Semantics/CMakeFiles/FortranSemantics.dir/resolve-directives.cpp.o -MF lib/Semantics/CMakeFiles/FortranSemantics.dir/resolve-directives.cpp.o.d -o lib/Semantics/CMakeFiles/FortranSemantics.dir/resolve-directives.cpp.o -c /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/flang/lib/Semantics/resolve-directives.cpp
../llvm-project/flang/lib/Semantics/resolve-directives.cpp:2123:16: error: reference cannot be bound to dereferenced null pointer in well-defined C++ code; pointer may be assumed to always convert to true [-Werror,-Wundefined-bool-conversion]
 2120 |           (sym->test(Symbol::Flag::CrayPointee) &&
      |                                                 ~~
 2121 |               // If CrayPointer is among the DSA list then the
 2122 |               // CrayPointee is Privatizable
 2123 |               &semantics::GetCrayPointer(*sym))) &&
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../llvm-project/flang/include/flang/Semantics/tools.h:315:15: note: 'GetCrayPointer' returns a reference
  315 | const Symbol &GetCrayPointer(const Symbol &crayPointee);
      |               ^
1 error generated.
352.221 [26/2/9] Building CXX object lib/Semantics/CMakeFiles/FortranSemantics.dir/check-omp-structure.cpp.o
384.501 [26/1/10] Building CXX object lib/Semantics/CMakeFiles/FortranSemantics.dir/semantics.cpp.o
ninja: build stopped: subcommand failed.

[llvm-ci]

LLVM Buildbot has detected a new failure on builder clang-cmake-x86_64-avx512-win running on avx512-intel64-win while building llvm at step 4 "cmake stage 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/81/builds/3709

Here is the relevant piece of the build log for the reference

Step 4 (cmake stage 1) failure: 'cmake -G ...' (failure)
'cmake' is not recognized as an internal or external command,
operable program or batch file.