Make CI output Makefile commands

This is good for debugging Makefiles on systems I don't have (eg. macOS)
End users will not be affected by this, and CI provides a persistent log
so clobbering isn't much of an issue.

.travis.yml

@@ -2,8 +2,8 @@ language: c
 sudo: required
 install:
   - ./.travis-deps.sh
-  - make
-  - sudo make install
+  - make Q=
+  - sudo make install Q=
 os:
   - linux
   - osx