Instead of using the --disable-verbose-compile hack, let's
use the standard option --enable-silent-rules (or 'make V=0' directly)
available with autoconf 1.11 and higher.
This is enabled in autoconf by using 'silent-rules' in AM_INIT_AUTOMAKE.
The verbosity of compilation is reduced in a similar manner as using
the --disable-verbose-compile option, so we can remove all that ugly
hackery.
5c8eb580b3