[COFF, ARM64] Implement llvm.addressofreturnaddress intrinsic

Reviewers: rnk, mstorsjo, efriedma, TomTan

Reviewed By: efriedma

Subscribers: javed.absar, kristof.beyls, chrib, llvm-commits

Differential Revision: https://reviews.llvm.org/D53962

llvm-svn: 345892