.travis.yml: eliminate remaining --color=never [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65707 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

.travis.yml

@@ -58,7 +58,7 @@ env:
 
   - &make-test-only
     script:
-      - "$SETARCH make -s test TESTOPTS=--color=never"
+      - "$SETARCH make -s test TESTOPTS=\"${TESTOPTS=$JOBS -q --tty=no}\""
 
   - &linux
     os: linux