Get rid of VTableContext::ComputeMethodVTableIndices() and VTableContext::getNumVirtualFunctionPointers(); also add some tests for the VTable indices output to make sure we don't regress

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@183298 91177308-0d34-0410-b5e6-96231b3b80d8
Fix the DUMP_OVERRIDERS macro in the VTableBuilder.cpp

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@183299 91177308-0d34-0410-b5e6-96231b3b80d8
Fix fallout from r183298, unused function (CollectPrimaryBases) causing the -Werror build to fail

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@183300 91177308-0d34-0410-b5e6-96231b3b80d8
ASTTests/DeclTest.cpp: Tweak on msvc target to add "-fno-ms-extensions".

MS extensions don't prefer imaginary suffix even with -std=c++11.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@183301 91177308-0d34-0410-b5e6-96231b3b80d8