Move all flags logic to MCSymbolMachO.

Also delete the now unused MCMachOSymbolFlags.h header as the only enum in there was moved to MCSymbolMachO.

Similarly to ELF and COFF, manipulating the flags is now done via helpers instead of spread
throughout the codebase.

Reviewed by Rafael EspĂ­ndola.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239316 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed