configure.ac: fix version for 0.103.1

After installing 0.103.1, "My Settings" "About my Computer" shows
0.102.0, because jarabe/config.py was unchanged, because configure.ac
was not changed before release.

Change configure.ac for most recent release.

Please also add SUCROSE_VERSION to any release checklist.

configure.ac

@@ -5,7 +5,7 @@ AC_PREREQ([2.59])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([configure.ac])
 
-SUCROSE_VERSION="0.102.0"
+SUCROSE_VERSION="0.103.1"
 AC_SUBST(SUCROSE_VERSION)
 
 AM_INIT_AUTOMAKE([1.9 foreign dist-xz no-dist-gzip])