scancpan: adjust package name

underscore is not allowed in BR package name.
this problem was found with the Perl module DB_File
which must give the BR package perl-db-file.

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

support/scripts/scancpan

@@ -607,6 +607,7 @@ say scalar keys %dist, q{ packages fetched.} unless $quiet;
 # Buildroot package name: lowercase
 sub fsname {
     my $name = shift;
+    $name =~ s|_|-|g;
     return q{perl-} . lc $name;
 }