Implement ARM trampoline for llvm compiler.
Implement ARM trampoline for llvm compiler.

Change-Id: Id851c4e98d08c2b5b2527860d045d7bed1a9797e

treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst