Automake directly uses $(V) for variable name expansion
which fails if $(V) is set to sth. else other than '0' or '1'.
This patch forces automake to not take $(V) into account
but to always use the default config for verbosity.
A better approach would be to actually take $(V) into account,
however not just pass it through (AM_V='$(V)') but
set AM_V to 0 if $V=0 / unset and to 1 otherwise.
This plan however is foiled due to my frustration about
automake as well as my lack of m4 skills.