[MC] Fix 80-col violas.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172776 91177308-0d34-0410-b5e6-96231b3b80d8
[MC] Expose ParseEscapedString to target AsmParser implementations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172777 91177308-0d34-0410-b5e6-96231b3b80d8
[MC/Mach-O] Add AsmParser support for .linker_option directive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172778 91177308-0d34-0410-b5e6-96231b3b80d8
[MC/Mach-O] Add support for linker options in Mach-O files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172779 91177308-0d34-0410-b5e6-96231b3b80d8