Add support for apple silicon

[joanibal]

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[joanibal]

I'm stumped...
I can't get passed this error
../meson.build:79:0: ERROR: 'fortran' compiler binary not defined in cross or native file
Indeed the meson cross file does not mention fortran

   [binaries]
   c = ['cc', '-arch', 'arm64']
   cpp = ['c++', '-arch', 'arm64']
   objc = ['cc', '-arch', 'arm64']
   objcpp = ['c++', '-arch', 'arm64']
   [host_machine]
   system = 'darwin'
   cpu = 'arm64'
   cpu_family = 'aarch64'
   endian = 'little'

But it would seem that it is hard coded here??

[joanibal]

Yay! it builds and passes the tests!