Farid Zakaria 1f8f8760b5 [CMake] Disable GCC -Wnonnull
I noticed during the build that GCC would emit a ton of nonnull
warnings.

Example:
```
/usr/local/google/home/fmzakari/code/github.com/llvm/llvm-project/clang/include/clang/AST/ExternalASTSource.h:378:54: warning: ‘this’ pointer is null [-Wnonnull]
  378 |       Ptr = reinterpret_cast<uint64_t>((Source->*Get)(Ptr >> 1));
      |                                        ~~~~~~~~~~~~~~^~~~~~~~~~
```

Reviewed By: MaskRay, rsmith

Differential Revision: https://reviews.llvm.org/D155857
2023-07-23 20:19:42 -07:00
..
2023-07-23 20:19:42 -07:00

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