References to static members treated differently

[kadircet]

we map all the member accesses to their type implicitly (to account for using-decls/bases etc.), but we don't do that for static members as they're not memberexprs, e.g:

struct Base { static int x; };
struct Foo : Base {};
Foo::^x;

we should get a reference to Foo not to declaration of x, which is in Base.

[llvmbot]

@llvm/issue-subscribers-clang-include-cleaner