[CMake] Add the gold plugin before clang

This is needed to connect dependencies between the LLVMgold plugin and the clang stage-2 builds due to limitations in ExternalProject_Add.

Patch by Mike Edwards

Differential Revision: http://reviews.llvm.org/D17655

llvm-svn: 262067

llvm/tools/CMakeLists.txt

@@ -34,6 +34,7 @@ endif()
 # requires targets specified in DEPENDS to exist before the call to
 # ExternalProject_Add.
 add_llvm_tool_subdirectory(lto)
+add_llvm_tool_subdirectory(gold)
 add_llvm_tool_subdirectory(llvm-ar)
 add_llvm_tool_subdirectory(llvm-config)
 add_llvm_tool_subdirectory(llvm-profdata)