[PATCH] rename _LIBCPP_TYPE_VIS_ONLY to _LIBCPP_TEMPLATE_VIS

[Reid Kleckner]

This naming change makes a lot of sense to me.

The reason we have this alternative macro is because it makes no sense to dllexport a template.  MSVC's semantics for it are not useful at all.

http://reviews.llvm.org/D4530