package/terminology: set eet path

Set eet path to avoid the following build failure raised since bump to
version 1.9.0 in commit	6ac557a5 and
https://git.enlightenment.org/apps/terminology.git/commit/?id=f15dd2881a5e87e7f3b03594983826f7480c12e7:

/home/buildroot/autobuild/instance-2/output-1/build/terminology-1.9.0/data/colorschemes/add_color_scheme.sh: 30: /home/buildroot/autobuild/instance-2/output-1/build/terminology-1.9.0/data/colorschemes/add_color_scheme.sh: /usr/bin/eet: not found

Fixes:
 - http://autobuild.buildroot.org/results/767acf73e4eade48cd3fdb43e9dd599ba7ef9661



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>