[XRay][AArch64] More staging for tail call support in XRay AArch64 - in compiler-rt
This patch provides a trampoline for function tail exit tracing. Still, it's staging because code 1 is passed to the handler function (indicating a normal exit) instead of 2, which would indicate tail exit. This is so until the logging part of XRay supports tail exits too.
Related: https://reviews.llvm.org/D28947 (LLVM)
Reviewers: dberris, rengolin
Reviewed By: rengolin
Subscribers: aemerson, llvm-commits, iid_iunknown
Differential Revision: https://reviews.llvm.org/D28948