[cmake] [libcxxabi] Call llvm_setup_rpath() when adding shared librar…

…ies.

Clang and llvm already use llvm_setup_rpath(), so this change will
help standarize rpath usage across all projects.

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

llvm-svn: 323455

libcxxabi/src/CMakeLists.txt

@@ -127,6 +127,7 @@ set(LIBCXXABI_TARGETS)
 # Build the shared library.
 if (LIBCXXABI_ENABLE_SHARED)
   add_library(cxxabi_shared SHARED $<TARGET_OBJECTS:cxxabi_objects>)
+  llvm_setup_rpath(cxxabi_shared)
   target_link_libraries(cxxabi_shared ${LIBCXXABI_LIBRARIES})
   set_target_properties(cxxabi_shared
                         PROPERTIES