Make first line of multi-line install steps an echo command
Make first line of multi-line install steps an echo command

These multi-line commands get collapsed to just the first line in the
Travis UI. Make that first line an echo command that explains what the
rest of the commands are doing.

google/trillian,AlCutter/trillian,gdbelvin/trillian,gdbelvin/trillian,gdbelvin/trillian,RJPercival/trillian,AlCutter/trillian,RJPercival/trillian,google/trillian