ART: Use JIT image for JIT run tests

Don't use interpreter image anymore. That was a stop-gap measure.

Change-Id: If4b43bc20026b1ed89e59690fe35771746e354e6
diff --git a/test/run-test b/test/run-test
index 73c92d4..828939d 100755
--- a/test/run-test
+++ b/test/run-test
@@ -252,7 +252,7 @@
         shift
     elif [ "x$1" = "x--jit" ]; then
         run_args="${run_args} --jit"
-        image_suffix="-interpreter"
+        image_suffix="-jit"
         shift
     elif [ "x$1" = "x--optimizing" ]; then
         run_args="${run_args} -Xcompiler-option --compiler-backend=Optimizing"