Revert "travis: run tests with "-v""

1500 lines out output makes it hard to see where the
failure happends, especially on mobile. Drop the verbose
flag again.

This reverts commit 8cad0e2f4f.

.travis.yml

@@ -34,7 +34,7 @@ script:
   - ./build-without-openssl.bash
   - ./build.bash
   - ./gocryptfs -speed
-  - ./test.bash -v
+  - ./test.bash
   - make root_test
   - ./crossbuild.bash
   - echo "rebuild with locked dependencies"