Avoid using the 'index' namespace as scope.

This should fix the bogus ambiguous reference errors reported by gcc 4.2.1 that the FreeBSD bot is using.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188850 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed