dpkg-buildpackage: add back an erroneously removed use statement

“use Dpkg::Version qw(check_version);” should not have been removed
in this file.

scripts/dpkg-buildpackage.pl

@@ -11,6 +11,7 @@ use Dpkg::Gettext;
 use Dpkg::ErrorHandling qw(:DEFAULT $warnable_error);
 use Dpkg::BuildOptions;
 use Dpkg::Compression;
+use Dpkg::Version qw(check_version);
 use Dpkg::Changelog qw(parse_changelog);
 use Dpkg::Arch qw(get_build_arch debarch_to_gnutriplet);
 use Dpkg::Vendor qw(get_current_vendor);