[libpng15] Bump version to 1.5.11beta02

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.5.11beta01 - April 28, 2012
+Libpng 1.5.11beta02 - April 28, 2012
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -9,24 +9,24 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.5.11beta01.tar.xz (LZMA-compressed, recommended)
-   1.5.11beta01.tar.gz
-   1.5.11beta01.tar.bz2
+   1.5.11beta02.tar.xz (LZMA-compressed, recommended)
+   1.5.11beta02.tar.gz
+   1.5.11beta02.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1511b01.7z  (LZMA-compressed, recommended)
-   lp1511b01.zip
+   lp1511b02.7z  (LZMA-compressed, recommended)
+   lp1511b02.zip
 
 Other information:
 
-   1.5.11beta01-README.txt
-   1.5.11beta01-LICENSE.txt
+   1.5.11beta02-README.txt
+   1.5.11beta02-LICENSE.txt
 
 Changes since the last public release (1.5.10):
 
-Version 1.5.11 [April 28, 2012]
+Version 1.5.11beta01 [April 28, 2012]
   Revised scripts/makefile.darwin: use system zlib; remove quotes around
     architecture list; add missing ppc architecture; add architecture options
     to shared library link; don't try to create a shared lib based on missing
@@ -37,6 +37,8 @@ Version 1.5.11 [April 28, 2012]
   Added -lssp_nonshared in a comment in scripts/makefile.freebsd
     and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE.
 
+Version 1.5.11beta02 [April 28, 2012]
+
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