Fix running kotlin dev compiler tests on our bots

Change-Id: I5ffd16a28850e580d32c21f7650f3d1295ef5e72
diff --git a/tools/test.py b/tools/test.py
index f5ce159..041f17b 100755
--- a/tools/test.py
+++ b/tools/test.py
@@ -287,9 +287,9 @@
   if options.print_obfuscated_stacktraces:
     gradle_args.append('-Pprint_obfuscated_stacktraces')
   if options.kotlin_compiler_old:
-    gradle_args.append('-Dcom.android.tools.r8.kotlincompilerold=1')
+    gradle_args.append('-Pkotlin_compiler_old')
   if options.kotlin_compiler_dev:
-    gradle_args.append('-Dcom.android.tools.r8.kotlincompilerdev=1')
+    gradle_args.append('-Pkotlin_compiler_dev')
     download_kotlin_dev.download_newest()
   if os.name == 'nt':
     # temporary hack