package/gettext-tiny: host and target legal-info are different

package/gettext-tiny: host and target legal-info are different

For the target, we only ever use the gettext-tiny source, while for
the host we also use that of gettext-gnu.

Fixes:
    http://autobuild.buildroot.org/results/572/5724b246cf411d95702fcff6dbf2b809b899108c/

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Vadim Kochan <vadim4j@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Tested-by: "Giulio Benetti" <giulio.benetti@micronovasrl.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>