libtar: use libtar tag in logging

Change-Id: I292366a237f9c8464f791d4d3cddaffc0d854577
Signed-off-by: Mohd Faraz <androiabledroid@gmail.com>
(cherry picked from commit 566ef6bcaab4b038956ccff73876876aedda65eb)
diff --git a/libtar/libtar.h b/libtar/libtar.h
index 04782b2..8013e61 100755
--- a/libtar/libtar.h
+++ b/libtar/libtar.h
@@ -45,6 +45,8 @@
 #define TH_EXT_TYPE		'x'
 #define TH_POL_TYPE_DO_NOT_USE		'p'
 
+#define LOG(...) printf("libtar: " __VA_ARGS__)
+
 /* our version of the tar header structure */
 struct tar_header
 {