Add bzip2 subdirectory


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18251 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Makefile b/lib/Support/Makefile
index 2e4a5b0..151f253 100644
--- a/lib/Support/Makefile
+++ b/lib/Support/Makefile
@@ -7,6 +7,7 @@
 # 
 ##===----------------------------------------------------------------------===##
 LEVEL = ../..
+PARALLEL_DIRS=bzip2
 LIBRARYNAME = LLVMSupport
 BUILD_ARCHIVE = 1