[clang] [llvm] [CodeGen][KCFI] Allow setting type hash from xxHash64 to FNV-1a (PR #167254)

[Nathan Chancellor via llvm-commits]

nathanchance wrote:

> Argh. Does aarch64 use a different asm comment character?

Yes and no. `#` works on when it is the first character of a line but not in the middle of a line.

https://godbolt.org/z/PPdfnG196

The binutils documentation says `/* */` should generally work but it depends on each target (but the CFI ones seems to support it).

https://sourceware.org/binutils/docs-2.45/as/Comments.html
https://sourceware.org/binutils/docs-2.45/as/AArch64_002dChars.html
https://sourceware.org/binutils/docs-2.45/as/ARM_002dChars.html
https://sourceware.org/binutils/docs-2.45/as/i386_002dChars.html

https://github.com/llvm/llvm-project/pull/167254