Update configure.ac bug URL for gitlab migration

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

configure.ac

@@ -24,7 +24,7 @@
 AC_PREREQ([2.60])
 AC_INIT([xf86-video-vboxvideo],
         [1.0.0],
-        [https://bugs.freedesktop.org/enter_bug.cgi?product=xorg],
+        [https://gitlab.freedesktop.org/xorg/driver/xf86-video-vbox/issues],
         [xf86-video-vboxvideo])
 AC_CONFIG_SRCDIR([Makefile.am])
 AC_CONFIG_HEADERS([config.h])