[tests] Update test data path

Test data is now included as part of the package, so look for it
here rather than in /system

TEST=none, test is currently broken

Change-Id: Ib5afa13541d5789319447524b6e1232905f1f3b2
diff --git a/main.cc b/main.cc
index 8e28650..f5cc4ff 100644
--- a/main.cc
+++ b/main.cc
@@ -11,6 +11,6 @@
 
 int main(int argc, char* argv[]) {
   ::testing::InitGoogleTest(&argc, argv);
-  testdata_dir = "/system/data/testdata";
+  testdata_dir = "/pkg/data/testdata";
   return RUN_ALL_TESTS();
 }