configure: fix version number

Fixes "configure: error: Weston version is greater than libweston."

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=102143
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

configure.ac

@@ -5,7 +5,7 @@ m4_define([weston_version],
           [weston_major_version.weston_minor_version.weston_micro_version])
 m4_define([libweston_major_version], [3])
 m4_define([libweston_minor_version], [0])
-m4_define([libweston_patch_version], [0])
+m4_define([libweston_patch_version], [90])
 
 AC_PREREQ([2.64])
 AC_INIT([weston],