[libclang] When initializing an ObjC object via the "[[ClassName alloc] init*]" pattern,

report the 'init*' invocation as non-dynamic via clang_Cursor_isDynamicCall.

Of course it is dynamic at runtime, but for purposes of indexing we can treat as an invocation to ClassName's init*.

Addresses rdar://18916871.

llvm-svn: 221641