Fix ULINK driver dependencies in configure.ac

Fix ULINK driver dependencies in configure.ac

Commit dd6274deed65c47ba2ef46e14259167d393399d8 (see
http://openocd.zylin.com/#/c/1475/ for futher information) adds the wrong
libusb dependency for the ULINK driver (libusb-0.1), when in fact the ULINK
driver uses the libusb-1.0 API since commit
f684252b2530d86f3a8330940105b86c770231f1.

Change-Id: I6946f1fdc0e26bfc7bdcff27a721e05a05b464a5
Signed-off-by: Martin Schmölzer <martin.schmoelzer@student.tuwien.ac.at>
Reviewed-on: http://openocd.zylin.com/1699
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>