Add System::executable_path()

test/src/main.cc

@@ -6,7 +6,7 @@
 int main(int argc, char * argv[])
 {
     ::testing::InitGoogleTest(&argc, argv);
-    System::init();
+    System::init(argv);
     mkdir("test/tmp", 0777);
     return RUN_ALL_TESTS();
 }