agl-postints: remove unneeded Glob

We're using ConditionPathExistsGlob on a straight filepath without wildcards.
Just use ConditionPathExists instead.

Change-Id: I6f9743beffa1c529013a084758a8589b380a0ba9
Signed-off-by: Martin Kelly <mkelly@xevo.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/9311
Reviewed-by: José Bollo <jobol@nonadev.net>
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Stéphane Desneux <stephane.desneux@iot.bzh>
Reviewed-by: Walt Miner <walt@linux.com>