bump version to 1.2.4

this is mainly to bundle a release with latest libulz changes to optparser
which makes it possible to use e.g. --foo bar additional to --foo=bar.
this is mainly to make -j 16 work, since it took myself several times by
surprise that this didn't seem to work, so i guess the same issue would
strike other users too.

Author: rofl0r

jobflow.c

@@ -16,7 +16,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 
-#define VERSION "1.2.3"
+#define VERSION "1.2.4"
 
 
 #undef _POSIX_C_SOURCE