Unrolled build for rust-lang#120529

Rollup merge of rust-lang#120529 - nikic:llvm-18-datalayout-fixes, r=cuviper

Update data layouts in custom target tests for LLVM 18

Apply the data layout changes from rust-lang#116672 to custom target specs as well, as we started validating them since rust-lang#120062.

Fixes rust-lang#120492.

r? ```@cuviper```

Author: rust-timer

tests/run-make/rust-lld-custom-target/custom-target.json

@@ -2,7 +2,7 @@
   "arch": "x86_64",
   "cpu": "x86-64",
   "crt-static-respected": true,
-  "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128",
+  "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128",
   "dynamic-linking": true,
   "env": "gnu",
   "has-rpath": true,

tests/run-make/rustdoc-target-spec-json-path/target.json

@@ -2,7 +2,7 @@
   "arch": "x86_64",
   "cpu": "x86-64",
   "crt-static-respected": true,
-  "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128",
+  "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128",
   "dynamic-linking": true,
   "env": "gnu",
   "executables": true,

tests/run-make/target-specs/my-awesome-platform.json

@@ -1,5 +1,5 @@
 {
-    "data-layout": "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-f64:32:64-f80:32-n8:16:32-S128",
+    "data-layout": "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-i128:128-f64:32:64-f80:32-n8:16:32-S128",
     "linker-flavor": "gcc",
     "llvm-target": "i686-unknown-linux-gnu",
     "target-endian": "little",

tests/run-make/target-specs/my-x86_64-unknown-linux-gnu-platform.json

@@ -1,6 +1,6 @@
 {
     "pre-link-args": {"gcc": ["-m64"]},
-    "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128",
+    "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128",
     "linker-flavor": "gcc",
     "llvm-target": "x86_64-unknown-linux-gnu",
     "target-endian": "little",