minidlna: do not select BR2_PACKAGE_GETTEXT_TOOLS

Commit 9ff640ae ("minidlna: needs
gettext and host-gettext tools if locale is enabled") modified the
minidlna package to fix gettext related issues. As part of this patch,
a select of BR2_PACKAGE_GETTEXT_TOOLS was added, which according to
the commit title is used to have host-gettext tools installed.

However, this is not what this option is about: this option is about
having gettext tools installed on the target.

Since this is not what minidlna needs, and we anyway plan to remove
this BR2_PACKAGE_GETTEXT_TOOLS option, this commit removes this
incorrect select statement.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Andrew Ruder <andrew.ruder@elecsyscorp.com>
Cc: Bernd Kuhls <berndkuhls@hotmail.com>
Tested-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>