travis: run tests with "-v"

Let's log more details.

#363

.travis.yml

@@ -36,7 +36,7 @@ script:
   - ./build-without-openssl.bash
   - ./build.bash
   - ./gocryptfs -speed
-  - ./test.bash
+  - ./test.bash -v
   - ./crossbuild.bash
   - echo "rebuild with locked dependencies"
   - echo travis_fold:start:dep