xutil_util-macros: bump to version 1.17

Needed by other xapp versions bump, which themselves are needed to fix
the missing link against the Xmu library (build failures similar to
http://autobuild.buildroot.org/results/1a4f84ad76ad8c4e70bff6878fc232edf46ff8f1/build-end.log

).

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>