Fix didn't fix the race condition in the makefiles


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5394 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/Makefile b/lib/ExecutionEngine/Makefile
index 123ccb7..ee12726 100644
--- a/lib/ExecutionEngine/Makefile
+++ b/lib/ExecutionEngine/Makefile
@@ -1,6 +1,6 @@
 LEVEL = ../..
 TOOLNAME = lli
-DIRS = Interpreter JIT
+PARALLEL_DIRS = Interpreter JIT
 
 JITLIBS  = lli-jit codegen x86
 USEDLIBS = lli-interpreter $(JITLIBS) bcreader vmcore analysis.a support.a target.a