hg: jdk8u/jdk8u-dev/jdk: 8155690: Update libPNG library to the latest up-to-date

[alexander.zvegintsev at oracle.com]

Changeset: dad995b4a62d
Author:    azvegint
Date:      2016-08-11 13:22 +0300
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/jdk/rev/dad995b4a62d

8155690: Update libPNG library to the latest up-to-date
Reviewed-by: serb

! src/share/native/sun/awt/libpng/CHANGES
! src/share/native/sun/awt/libpng/LICENSE
! src/share/native/sun/awt/libpng/README
! src/share/native/sun/awt/libpng/png.c
! src/share/native/sun/awt/libpng/png.h
! src/share/native/sun/awt/libpng/pngconf.h
! src/share/native/sun/awt/libpng/pngdebug.h
! src/share/native/sun/awt/libpng/pngerror.c
! src/share/native/sun/awt/libpng/pngget.c
! src/share/native/sun/awt/libpng/pnginfo.h
! src/share/native/sun/awt/libpng/pnglibconf.h
! src/share/native/sun/awt/libpng/pngmem.c
! src/share/native/sun/awt/libpng/pngpread.c
! src/share/native/sun/awt/libpng/pngpriv.h
! src/share/native/sun/awt/libpng/pngread.c
! src/share/native/sun/awt/libpng/pngrio.c
! src/share/native/sun/awt/libpng/pngrtran.c
! src/share/native/sun/awt/libpng/pngrutil.c
! src/share/native/sun/awt/libpng/pngset.c
! src/share/native/sun/awt/libpng/pngstruct.h
! src/share/native/sun/awt/libpng/pngtest.c
! src/share/native/sun/awt/libpng/pngtrans.c
! src/share/native/sun/awt/libpng/pngwio.c
! src/share/native/sun/awt/libpng/pngwrite.c
! src/share/native/sun/awt/libpng/pngwtran.c
! src/share/native/sun/awt/libpng/pngwutil.c