[Libguestfs] [PATCH] perl: Switch to using Module::Build.

Switch from 'ExtUtils::MakeMaker' to 'Module::Build'. There's not really a huge difference here. The interfacing gymnastics that we have to do to make Makefile.am and Module::Build talk to each other is probably a little bit simpler. I compared the output of 'make install' before and after, and there's not much difference. 'perllocal.pod' is not installed (see recent bug report), and 'bindtests.pl' is also not installed. However the empty file 'Guestfs.bs' is now copied in, but in Fedora we were already removing any '*.bs' files. This is good reading (make sure to read the comments too): http://blogs.perl.org/users/rurban/2011/01/why-modulebuild-sucks.html Rich.