Stop tracking retain count of OSObject after escape to void * / other primitive types

Stop tracking retain count of OSObject after escape to void * / other primitive types

Escaping to void * / uint64_t / others non-OSObject * should stop tracking,
as such functions can have heterogeneous semantics depending on context,
and can not always be annotated.

rdar://46439133

Differential Revision: https://reviews.llvm.org/D55465

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@348675 91177308-0d34-0410-b5e6-96231b3b80d8