[podspec] Build v0.4.x for macOS arm64

[alloy]

Summary

Backports #345 to v0.4.x

Test Plan

$ ditto --arch arm64 ./destroot/bin/hermesc ./destroot/bin/hermesc-arm64
$ file ./destroot/bin/hermesc-arm64 
./destroot/bin/hermesc-arm64: Mach-O 64-bit executable arm64
$ ./destroot/bin/hermesc-arm64 -version
LLVM (http://llvm.org/):
  LLVM version 8.0.0svn
  Optimized build

Hermes JavaScript compiler.
  Hermes release version: 0.4.3
  HBC bytecode version: 74

[tmikov]

Note: this has to be merged manually.

[alloy]

Hmm, interesting, looks like the build task staying quiet for a while leads to the CI task failing. Looking into it.

[alloy]

Ok, looks like it’s building. I’ll test the artefacts tomorrow.

[alloy]

@tmikov @Huxpro Ok, this is good to go. Thanks a lot in advance! 🙏

[alloy]

Bump, could we get a release of this for the macOS RN 0.63.x release?

[appden]

Can we change this to the stable release?

[alloy]

The beta release needs to keep being used to build macOS arm64 binaries for Big Sur.

[Huxpro]

@alloy I had the same question for this one as for #390 so we can decide the version number.