TT#6428 Build-Depend on libmodule-build-perl

Build-Depend on libmodule-build-perl which is not part of the perl
distribution anymore, or the perl versions that provided the module.

Change-Id: Ie62c0b0a39778dc010ef5801577f9e3537d77810

debian/control

@@ -4,6 +4,7 @@ Priority: extra
 Maintainer: Sipwise Development Team <support@sipwise.com>
 Build-Depends:
  debhelper (>= 9~),
+ libmodule-build-perl | perl (<< 5.21.0~),
 Standards-Version: 3.9.7
 Homepage: https://www.sipwise.com/