[MC] Generalize MCContext's SectionSymbols field.

Change SectionSymbols so that it doesn't hard-code ELF types, so that
it can be used for non-ELF targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288607 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed