Implemented aarch64 SIMD copy related ACLE intrinsic :
vget_lane, vset_lane, vcopy_lane, vcreate, vdup_n, vdup_lane, vmov_n.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@192411 91177308-0d34-0410-b5e6-96231b3b80d8