Rename utility function templates

isExternCTemplate() and getLanguageLinkageTemplate() have nothing to do with
templates despite the dubious naming scheme.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209969 91177308-0d34-0410-b5e6-96231b3b80d8
Support C++11 scoped enums in NamedDecl::isCXXClassMember()

Resolves an old FIXME.

No callers depend on this giving the right answer so I haven't been able to
cook up a useful test case.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209970 91177308-0d34-0410-b5e6-96231b3b80d8