This patch fixes some issues in classes providing cpan module build support:
* add support even for xs modules with more than 3 levels as
B::Hooks::End::Of::Scope or Math::Random::ISAAC::XS
* correct handling of Module::Build (as far as stolen from pkgsrc
and my humble knowledge)
* configure to install to vendor_libs as default, even when
inherited do_install remains unused (overwritten do_install)
Signed-off-by: Jens Rehsack <sno@netbsd.org> Signed-off-by: Ross Burton <ross.burton@intel.com>
