[microsoft] In Microsoft mode, if we are inside a template class member...

[microsoft] In Microsoft mode, if we are inside a template class member function and we can't resolve an identifier then assume the identifier is type dependent. The goal is to postpone name lookup to instantiation time to be able to search into type dependent base classes.

This fixes a few errors when parsing MFC code with clang.
BTW clang trunk is now about 5 patches away to be able the parse the default wizard-generated MFC project.

llvm-svn: 140452