S/390: Better help text for -mmvcle.

gcc/ChangeLog

	* config/s390/s390.opt (mmvcle): More verbose help text.

From-SVN: r232418

gcc/ChangeLog

 2016-01-15  Dominik Vogt  <vogt@linux.vnet.ibm.com>
 
+	* config/s390/s390.opt (mmvcle): More verbose help text.
+
+2016-01-15  Dominik Vogt  <vogt@linux.vnet.ibm.com>
+
 	* config/s390/s390.opt: Add period to -mzvector option text.
 
 2016-01-15  Richard Biener  <rguenther@suse.de>

gcc/config/s390/s390.opt

@@ -171,7 +171,7 @@ Schedule code for given CPU.
 
 mmvcle
 Target Report Mask(MVCLE) Save
-mvcle use.
+Use the mvcle instruction for block moves.
 
 mzvector
 Target Report Mask(ZVECTOR) Save