Add a clang-arm64 CI

[inkydragon]

Add Clang-Arm64 CI to catch the following build error:

This fails to build on Windows, any ideas?

clang  -O2 -pipe -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector-strong -Wp,-D__USE_MINGW_ANSI_STDIO=1 -fno-builtin -fno-strict-aliasing  -std=c99 -Wall -I/c/M/B/src/build-CLANGARM64 -I/c/M/B/src/build-CLANGARM64/include -I/c/M/B/src/build-CLANGARM64/aarch64 -I/c/M/B/src/build-CLANGARM64/src -DASSEMBLER -D__BSD_VISIBLE -Wno-implicit-function-declaration -I/c/M/B/src/build-CLANGARM64/ld128 -c src/s_fma.c -o src/s_fma.c.o
In file included from src/s_fma.c:31:
In file included from C:/M/B/src/build-CLANGARM64/include/openlibm_fenv.h:6:
C:/M/B/src/build-CLANGARM64/include/openlibm_fenv_aarch64.h:39:9: error: unknown type name '__uint64_t'; did you mean 'uint64_t'?
   39 | typedef __uint64_t      fenv_t;
      |         ^~~~~~~~~~
      |         uint64_t

#319 (comment)

---

GitHub do not provide an arm based windows runner.
But there are arm based linux runners for Public preview.

See:

• https://docs.github.com/en/actions/using-github-hosted-runners/using-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
• https://github.com/actions/partner-runner-images#windows-11-on-arm

  There is no Windows 11 on Arm image with development tools installed. It is under development and will be added here when it's available.

• https://github.com/msys2/MINGW-packages/blob/c03e2cca5238492880bbc0688509f45ffb25dec7/.github/workflows/main.yml#L22

[BjornTheProgrammer]

Seems like some of these build issues come from using __uint64_t as stated in PR #305

Firstly, replace non-standard __uint64_t with standard (but optional) uint64_t. __uint64_t is not a part of C standard; it is defined by some platforms but might not be present in every environment (e.g. in freestanding build). On the other hand, uint64_t is standard C. It is optional but virtually guaranteed to be present for any 32/64 bit machine.