[Build-common-hackers] Bug#714542: cdbs: Please use "--" long option prefixes for Perl's Module::Build build system

[Leon Timmermans]

> As we take pride in CDBS being backporting-friendly, it would be nice if
you could also test in a Squeeze (i.e. oldstable) environment that the
change doesn't break things that far back either.

The 'new style' arguments were introduced in Module::Build 0.17,
released in March 2003. Backwards compatibility really shouldn't be an
issue.

Leon