None of these attributes require FunctionTemplate to be explicitly listed as part of their subject definition. FunctionTemplateDecls are not what the attribute appertains to in the first place -- it attaches to the underlying FunctionDecl.

The attribute emitter was using FunctionTemplate to map the diagnostic to "functions or methods", but that isn't a particularly clear diagnostic in these cases anyway (since they do not apply to ObjC methods). Updated the attribute emitter to remove custom logic for FunctionTemplateDecl, and updated the test cases for the change in diagnostic wording.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209209 91177308-0d34-0410-b5e6-96231b3b80d8