Allow passing of multitple --invoke-with.

Also fix usage message.

Change-Id: I67f2168ed22ccef999c798585d73ad25c8885716
diff --git a/test/etc/push-and-run-test-jar b/test/etc/push-and-run-test-jar
index ce80ae4..b1dddfc 100755
--- a/test/etc/push-and-run-test-jar
+++ b/test/etc/push-and-run-test-jar
@@ -46,7 +46,11 @@
         shift
     elif [ "x$1" = "x--invoke-with" ]; then
         shift
-        INVOKE_WITH="$1"
+        if [ "x$INVOKE_WITH" = "x" ]; then
+            INVOKE_WITH="$1"
+        else
+            INVOKE_WITH="$INVOKE_WITH $1"
+        fi
         shift
     elif [ "x$1" = "x--no-verify" ]; then
         VERIFY="n"