When I had libusb-0.1.10a installed on my system, gok-1.2.3 failed during configure, saying LIBUSB was not found. It emerges with both 0.1.11 and 0.1.12. Now, I know that libusb-0.1.10a is not in portage anymore, but making gok-1.2.3 depend on >=libusb-0.1.11 would prevent this failure for users - and that's what we want. :) Also, you might want to restrict test for gok-1.2.3 as well, it does the same thing as pessulus (bug #180042).
gok belongs to gnome-accessibility
libusb dep adjusted. Tests fixed proper by removing the missing file from POTFILES.in too (it already removed that file from Makefile too in src_test, but not intltool is strict to take issues with it in POTFILES.in too)