report unused-value warning also for warn_unused types



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186793 91177308-0d34-0410-b5e6-96231b3b80d8
Convert  Sema::MatchTemplateParametersToScopeSpecifier to ArrayRef.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186794 91177308-0d34-0410-b5e6-96231b3b80d8