Java jars need the MANIFEST.MF file to be first in the archive

https://bugzilla.redhat.com/show_bug.cgi?id=465664

brp-java-repack-jars

@@ -79,7 +79,10 @@ if [ ! -z "$JARS" ]; then
 		pushd $JARDIR > /dev/null
 
 		if [ -n "`find -not -name '.'`" ]; then
-			find * -not -name '.' | LC_ALL=C sort | /usr/bin/zip -q -X -9 $j -@
+			if [ -e META-INF/MANIFEST.MF ]; then
+			    /usr/bin/zip -q -X -9 $j META-INF/MANIFEST.MF
+			fi
+			find * -not -name '.' | LC_ALL=C sort | /usr/bin/zip -u -q -X -9 $j -@
 		else
 			# Put the empty jar back
 			touch $j