Parse: Recover more gracefully from extra :: tokens before a {

Instead of crashing, recover by eating the extra trailing scope
qualifier.  This means we will treat 'struct A:: {' as 'struct A {'.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@224966 91177308-0d34-0410-b5e6-96231b3b80d8
Fix build breakage

That's what I get for last second changes...

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@224967 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "DebugInfo: Generalize debug info location handling"

Asserting when building compiler-rt when using a GCC host compiler.
Reverting while I investigate.

This reverts commit r224941.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@224970 91177308-0d34-0410-b5e6-96231b3b80d8