druntime: Fix core.stdc.stdint.(u)int64_t on 64-bit macOS etc.

kinke · kinke · commit 3d8b1bd31c2e · 2018-05-17T01:59:05.000+02:00
* Use it instead of newly introduced, LDC-specific
  `core.stdc.config.c(pp)_(u)int64_t`.
* Cherry-pick Walter's upstream commit replacing the magic structs in
  core.stdc.config by magic enums (supporting implicit conversion from
  integer literals) [as well as adding cpp_{size,ptrdiff}_t].
* Add a clarifying comment wrt. DMD/LDC mangling difference on 64-bit
  OS X and use version(LDC) guards.
* Adapt dmd-testsuite accordingly.
diff --git a/runtime/druntime b/runtime/druntime
@@ -1 +1 @@
-Subproject commit 55ed2ae2bbb7f62d7803f28eca843eee96e5fd6f
+Subproject commit dbbdda880484e7e7d228861ff97938f979b8691b
diff --git a/tests/d2/dmd-testsuite b/tests/d2/dmd-testsuite
@@ -1 +1 @@
-Subproject commit 35e6bf9d6ec37b797c6330ac667db06f852e6c3d
+Subproject commit 75034becf67b754a3cd828085f9012be757bb722
