Add LLVM plugin for gold.

llvm-svn: 63623
diff --git a/llvm/tools/Makefile b/llvm/tools/Makefile
index 909a548..0cf613a 100644
--- a/llvm/tools/Makefile
+++ b/llvm/tools/Makefile
@@ -27,6 +27,10 @@
 
 ifeq ($(ENABLE_PIC),1)
 PARALLEL_DIRS += lto
+
+ifdef BINUTILS_INCDIR
+PARALLEL_DIRS += gold
+endif
 endif
 
 include $(LEVEL)/Makefile.common