Doh

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37917 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Makefile b/lib/Target/Makefile
index 81e8474..59f50fe 100644
--- a/lib/Target/Makefile
+++ b/lib/Target/Makefile
@@ -15,5 +15,6 @@
 # value for PARALLEL_DIRS which must be set before Makefile.rules is included
 include $(LEVEL)/Makefile.config
 
-include $(LLVM_SRC_ROOT)/Makefile.rules
+PARALLEL_DIRS := $(TARGETS_TO_BUILD)
 
+include $(LLVM_SRC_ROOT)/Makefile.rules