PR19558: don't produce an "unused variable" warning for a variable template partial specialization.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@207260 91177308-0d34-0410-b5e6-96231b3b80d8
Fix leak of GlobalModuleIndex::IdentifierIndex, found by LSan.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@207262 91177308-0d34-0410-b5e6-96231b3b80d8