d/rules: prevent main perl module being installed in the wrong binary package

Due to the rule used in debian/gestioip.install with a loose pattern '*',
the perl module GestioIP.pm was being installed in both gestioip and
libgestioip-perl binary packages.

Prevent this by overriding dh_install with an explicit exclude pattern.

Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>