Clean up build to be less verbose

Clean up build to be less verbose

Rather than printing out 10+ lines of text for every C file that
is compiled, it now prints out one: "CC foo.c"

While this can hide some key information from the developer, it
also highlights compiler warnings.

We can later go through and add a developer-specific option
to turn on the old behavior.  Probably by suppressing the "--quiet"
option to libtool