package/bison: disable libtextstyle

Recent bison versions added support for fancy error output using gettext
provided libtextstyle. The Buildroot gettext version does not provided
all needed features. However host-bison might detect host installed
libtextstyle at configure time, but fail at run time because of missing
symbols in Buildroot provided libtextstyle.

We don't really need fancy output of host packages, so just disable
libtextstyle support.

Fixes (libpcap):
http://autobuild.buildroot.net/results/058e8ec90da3c06e31b31eb94541331cced44db3/
http://autobuild.buildroot.net/results/d99dda99722c53730b5964bd4ff1e1281c4ad759/
http://autobuild.buildroot.net/results/056fd1246554fe7def416429620175e86530c0a7/



Cc: Xogium <contact@xogium.me>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Tested-by: Xogium <contact@xogium.me>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>