git: openjdk/jdk17u-dev: 8348598: Update Libpng to 1.6.47

[Goetz Lindenmaier]

Changeset: 025da55d
Branch: master
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2025-04-02 11:27:59 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/025da55defb4428a0cbc75b24842513011f1220d

8348598: Update Libpng to 1.6.47

Reviewed-by: phh
Backport-of: 6b82b42a2116900b2125e03c1ffa0824d6062757

! make/modules/java.desktop/lib/Awt2dLibraries.gmk
! src/java.desktop/share/legal/libpng.md
! src/java.desktop/share/native/libsplashscreen/libpng/CHANGES
! src/java.desktop/share/native/libsplashscreen/libpng/LICENSE
! src/java.desktop/share/native/libsplashscreen/libpng/README
! src/java.desktop/share/native/libsplashscreen/libpng/png.c
! src/java.desktop/share/native/libsplashscreen/libpng/png.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngconf.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngerror.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngget.c
! src/java.desktop/share/native/libsplashscreen/libpng/pnginfo.h
! src/java.desktop/share/native/libsplashscreen/libpng/pnglibconf.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngmem.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngpread.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngpriv.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngread.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngrtran.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngrutil.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngset.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngstruct.h