git: openjdk/jdk21u-dev: master: 8375063: Update Libpng to 1.6.54

[Sergey Bylokhov]

Changeset: 422784f7
Branch: master
Author:    Sergey Bylokhov <serb at openjdk.org>
Date:      2026-02-01 03:20:32 +0000
URL:       https://git.openjdk.org/jdk21u-dev/commit/422784f7d43e38f4e05e0d1399e20cff2bab6a57

8375063: Update Libpng to 1.6.54

Backport-of: a2e749572e03dd394d123b701e163e3837472dd0

! 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/pnglibconf.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngmem.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/pngtrans.c