Add an error message to remind users to run from kernel directory

This change will hopefully remind my future self to run these tests from
the right directory.

Test: run script from Android dir
Change-Id: I717baa05e6103d0601644e2b13e96dbed676d4c2
1 file changed
tree: a4ea971052bc95adef916b33ca4f718475a4914b
  1. net/
  2. test_mappings/
  3. METADATA
  4. OWNERS