Make travis builds verbose.
Make travis builds verbose.

Recover the full compiler command lines for reference in the
logs after the AM_SILENT_RULES change.

ShiftMediaProject/vorbis,ShiftMediaProject/vorbis,ShiftMediaProject/vorbis,ShiftMediaProject/vorbis,ShiftMediaProject/vorbis,ShiftMediaProject/vorbis,erikd/vorbis,erikd/vorbis,erikd/vorbis,erikd/vorbis