hg: jdk9/client/jdk: 8155691: Update GIFlib library to the latest up-to-date

[alexander.zvegintsev at oracle.com]

Changeset: c07be59d7160
Author:    azvegint
Date:      2016-08-16 22:10 +0300
URL:       http://hg.openjdk.java.net/jdk9/client/jdk/rev/c07be59d7160

8155691: Update GIFlib library to the latest up-to-date
Reviewed-by: serb

! src/java.desktop/share/native/libsplashscreen/giflib/dgif_lib.c
! src/java.desktop/share/native/libsplashscreen/giflib/gif_lib.h
! src/java.desktop/share/native/libsplashscreen/giflib/gifalloc.c
+ src/java.desktop/share/native/libsplashscreen/giflib/openbsd-reallocarray.c