[libpng15] Corrected Android builds and corrected libpng.vers with symbol

prefixing This adds an API to set optimization options externally,
    providing an alternative and general solution for the non-portable
    run-time tests used by the ARM Neon code.  It also makes those tests
    compile and link on Android.
  The order of settings vs options in pnglibconf.h is reversed to allow
    settings to depend on options and options can now set (or override) the
    defaults for settings.

libpng.3

@@ -1,4 +1,4 @@
-.TH LIBPNG 3 "February 27, 2013"
+.TH LIBPNG 3 "March 4, 2013"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.5.15beta08
 .SH SYNOPSIS
@@ -277,7 +277,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.5.15beta08
 
 \fBvoid png_set_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_16p \fIbackground\fP\fB);\fP
 
-\fBvoid png_set_check_for_invalid_index(png_structrp \fP\fIpng_ptr\fP\fB, int \fIallowed\fP\fB);\fP
+\fBvoid png_set_check_for_invalid_index(png_structp \fP\fIpng_ptr\fP\fB, int \fIallowed\fP\fB);\fP
 
 \fBvoid png_set_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fP\fIwhite_x\fP\fB, double \fP\fIwhite_y\fP\fB, double \fP\fIred_x\fP\fB, double \fP\fIred_y\fP\fB, double \fP\fIgreen_x\fP\fB, double \fP\fIgreen_y\fP\fB, double \fP\fIblue_x\fP\fB, double \fIblue_y\fP\fB);\fP
 
@@ -492,7 +492,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 Libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.15beta08 - February 27, 2013
+ libpng version 1.5.15beta08 - March 4, 2013
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2013 Glenn Randers-Pehrson
@@ -503,7 +503,7 @@ Libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.15beta08 - February 27, 2013
+ libpng versions 0.97, January 1998, through 1.5.15beta08 - March 4, 2013
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2013 Glenn Randers-Pehrson
 
@@ -1001,8 +1001,7 @@ you can retrieve with
 
 If you call the png_set_read_user_chunk_fn() function, then all unknown
 chunks will be saved when read, in case your callback function will need
-one or more of them.  This behavior can be changed with the
-png_set_keep_unknown_chunks() function, described below.
+one or more of them.
 
 At this point, you can set up a callback function that will be
 called after each row has been read, which you can use to control
@@ -1096,7 +1095,11 @@ callback function:
 
     #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
       /* ignore all unknown chunks: */
+    #  if PNG_LIBPNG_VER < 10700
+      png_set_keep_unknown_chunks(read_ptr, 2, NULL, 0);
+    #  else
       png_set_keep_unknown_chunks(read_ptr, 1, NULL, 0);
+    #  endif
 
       /* except for vpAg: */
       png_set_keep_unknown_chunks(read_ptr, 2, vpAg, 1);
@@ -5115,7 +5118,7 @@ Other rules can be inferred by inspecting the libpng source.
 
 .SH XIV. Y2K Compliance in libpng
 
-February 27, 2013
+March 4, 2013
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
@@ -5401,7 +5404,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.5.15beta08 - February 27, 2013:
+Libpng version 1.5.15beta08 - March 4, 2013:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -5424,7 +5427,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.15beta08, February 27, 2013, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.15beta08, March 4, 2013, are
 Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -5523,7 +5526,7 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-February 27, 2013
+March 4, 2013
 
 .\" end of man page