package/x11r7/xapp_xload: disable gettext detection when not needed

package/x11r7/xapp_xload: disable gettext detection when not needed

Patch originates from FreeBSD:
https://lists.freebsd.org/pipermail/freebsd-x11/2015-July/016528.html
https://svnweb.freebsd.org/ports/head/x11/libXpm/Makefile?r1=384234&r2=391122&pathrev=391122

Fixes:
http://autobuild.buildroot.net/results/2ad/2ad27875ce5c16a111d54d452eb395257e9b5e2b/

Similar to how xlib_libXpm was fixed back in 2018, with 6653b0929f
(package/x11r7/xlib_libXpm: disable gettext detection when not needed).

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>