Build Spiff directory

llvm-svn: 12876
diff --git a/llvm/utils/Makefile b/llvm/utils/Makefile
index 4636aac..76e1a60 100644
--- a/llvm/utils/Makefile
+++ b/llvm/utils/Makefile
@@ -8,7 +8,7 @@
 ##===----------------------------------------------------------------------===##
 LEVEL = ..
 
-DIRS = Burg TableGen
+DIRS = Burg TableGen Spiff
 
 include $(LEVEL)/Makefile.common