Fix run-test with JIT enabled

Uses -Xusejit:true instead of -Xjit.

Bug: 17950037
Change-Id: I8280245e3e2aeced5927ade1632b7a110b040136
diff --git a/test/etc/run-test-jar b/test/etc/run-test-jar
index 7a2ad1c..671d56d 100755
--- a/test/etc/run-test-jar
+++ b/test/etc/run-test-jar
@@ -265,7 +265,7 @@
 fi
 
 if [ "$JIT" = "y" ]; then
-    INT_OPTS="-Xjit"
+    INT_OPTS="-Xusejit:true"
     if [ "$VERIFY" = "y" ] ; then
       COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=interpret-only"
     else