emotion: let's work out of tree.

NOTE: I have no idea why we did require emotion_test to only work
in tree. If you have an explanation, I would be glad to ear it. In the
mean time, this patch restore the use of emotion_test when your build
tree is not around.

src/tests/emotion/emotion_test_main.c

@@ -705,8 +705,6 @@ main(int argc, char **argv)
       ECORE_GETOPT_VALUE_NONE
     };
 
-   putenv("EFL_RUN_IN_TREE=1");
-
    if (!ecore_evas_init())
      return -1;
    if (!edje_init())