lib: Add decompression function

Add decompression function to decompress gzip package by using
zlib APIs. Modification for Zlib success compile in LK.

Change-Id: Ibc840fbc1094c0126ddc13d6422d06f5e196be7a
diff --git a/lib/zlib_inflate/inflate.c b/lib/zlib_inflate/inflate.c
index 870f89b..e341300 100644
--- a/lib/zlib_inflate/inflate.c
+++ b/lib/zlib_inflate/inflate.c
@@ -80,6 +80,8 @@
  * The history for versions after 1.2.0 are in ChangeLog in zlib distribution.
  */
 
+#define NO_GZIP
+
 #include "zutil.h"
 #include "inftrees.h"
 #include "inflate.h"