Add help option on runtests.sh

diff -r 14d733e5e1d0 tools/xm-test/runtest.sh
@@ -14,6 +14,7 @@
     echo "  -q          : run a quick test set"
     echo "  -e <email>  : set email address for report"
     echo "  -s <report> : just submit report <report>"
+    echo "  -h | --help : show this help"
 }
 
 # Just submit the report

@@ -209,6 +210,10 @@
       -s)
 	  run=no
 	  ;;
+      -h|--help)
+          usage
+          exit 0
+          ;;
       *)
 	  REPORT=$1
 	  break