[Rootfs] Update RootFS and GCC version for aarch64-apple-darwin

[giordano]

Companion PR to JuliaPackaging/Yggdrasil#4551. See also JuliaPackaging/Yggdrasil#4547.

[giordano]

IMPORTANT

The new build of GCC has a couple of ABI incompatibilities compared to the previous one:

1. as reported by System library build of Julia master fails on ARM macOS JuliaLang/julia#44435, libgcc_s is now called libgcc_s.1.1.dylib instead of libgcc_s.2.dylib. This should have little impact overall, most libraries shouldn't link directly to libgcc_s
2. more importantly, this build contains libquadmath for aarch64-apple-darwin. This means most/all Fortran libraries built with this new compiler will link to it, but libquadmath is currently not part of CompilerSupportLibraries_jll for this platform, so they'll all fail to load. In any case we'll update CompilerSupportLibraries_jll in Julia to include the new compiler libraries and we'll backport also the change to the release-1.7 (less important since Julia is mostly broken here anyway) and release-1.8 branches , but we'll probably see into the wild some errors like

   ERROR: LoadError: InitError: could not load library "/path/to/libray.dylib"
   dlopen(/path/to/libray.dylib, 1): Library not loaded: @rpath/libquadmath.0.dylib
     Referenced from: /path/to/libray.dylib
     Reason: image not found
   

Now the good news: after placing the new libquadmath.0.dylib among other compiler libraries I was able to successfully run the tests of SHTOOLS.jl and BipolarSphericalHarmonics.jl with a new build of SHTOOLS_jll.jl compiled with the new toolchain, and also the LinearAlgebra test suite with a new build of OpenBLAS 0.3.20.

Originally posted by @giordano in JuliaPackaging/Yggdrasil#4551 (comment)