Update libpng from 1.6.3 to 1.6.10

Change-Id: I76e81e7fd267d15991cd342c5caeb2fe77964ebf
diff --git a/libpngpf.3 b/libpngpf.3
index 15419f4..844a9fc 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "July 18, 2013"
+.TH LIBPNGPF 3 "March 6, 2014"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.3
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.10
 (private functions)
 .SH SYNOPSIS
 \fB#include \fI"pngpriv.h"