Add basic zlib support to LLVM. This would allow to use compression/uncompression in selected LLVM tools.

llvm-svn: 180083
diff --git a/llvm/lib/Support/CMakeLists.txt b/llvm/lib/Support/CMakeLists.txt
index 3746a81..01565c5 100644
--- a/llvm/lib/Support/CMakeLists.txt
+++ b/llvm/lib/Support/CMakeLists.txt
@@ -7,6 +7,7 @@
   BranchProbability.cpp
   circular_raw_ostream.cpp
   CommandLine.cpp
+  Compression.cpp
   ConstantRange.cpp
   ConvertUTF.c
   ConvertUTFWrapper.cpp