Support for tar -z option for uncompressing only

Config.h

@@ -225,6 +225,9 @@
 // Enable support for "--exclude" and "-X" for excluding files
 #define BB_FEATURE_TAR_EXCLUDE
 //
+// Enable support for tar -z option (currently only works for inflating)
+#define BB_FEATURE_TAR_GZIP 
+//
 //// Enable reverse sort
 #define BB_FEATURE_SORT_REVERSE
 //
@@ -324,6 +327,12 @@
 #endif
 #endif
 //
+#ifdef BB_FEATURE_TAR_GZIP
+#ifndef BB_GUNZIP
+#define BB_GUNZIP
+#endif
+#endif
+//
 #if defined BB_MOUNT && defined BB_FEATURE_NFSMOUNT
 #define BB_NFSMOUNT
 #endif