[COFF, ARM64] Add _InterlockedAdd intrinsic

Reviewers: rnk, mstorsjo, compnerd, TomTan, haripul, javed.absar, efriedma

Reviewed By: efriedma

Subscribers: efriedma, kristof.beyls, chrib, jfb, cfe-commits

Differential Revision: https://reviews.llvm.org/D52811

llvm-svn: 343894