[clang-tools-extra] [clang-tidy] Add portability-avoid-platform-specific-fundamental-types (PR #146970)

[JJ Marr via cfe-commits]

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@@ -0,0 +1,43 @@
+//===--- AvoidPlatformSpecificFundamentalTypesCheck.h - clang-tidy -------*- C++
+//-*-===//
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jj-marr wrote:

This requires turning off `clang-format` since line 1 is too long.

https://github.com/llvm/llvm-project/pull/146970