Revert r201237+r201238: Demote EmitRawText call in AsmPrinter::EmitInlineAsm() and remove hasRawTextSupport() call

It introduced multiple test failures in the buildbots.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201241 91177308-0d34-0410-b5e6-96231b3b80d8