Revert [libcxxabi] r323455 - [cmake] [libcxxabi] Call llvm_setup_rpath() when adding shared libraries.
Revert [libcxxabi] r323455 - [cmake] [libcxxabi] Call llvm_setup_rpath() when adding shared libraries.

Shoaib Meenai pointed out this will break standalone builds can be built without llvm.

Differential Revision: https://reviews.llvm.org/D42460

git-svn-id: 6a9f6578bdee8d959f0ed58970538b4ab6004734@323458 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/libcxxabi,llvm-mirror/libcxxabi,llvm-mirror/libcxxabi,llvm-mirror/libcxxabi,llvm-mirror/libcxxabi