net-libs/libmbim: Version bump to 1.18.0

net-libs/libmbim: Version bump to 1.18.0

EAPI bump 6->7.
BDEPEND on glib-utils explicitly; do not rely on glib pulling this in.
Ensure test-suite passes, closes bug #628274.
Updated minimum glib version as per upstream autoconf values.

Closes: https://bugs.gentoo.org/628274
Bug: https://bugs.gentoo.org/681450
Suggested-By: Mart Raudsepp <leio@gentoo.org>
Reported-By: Toralf Förster <toralf@gentoo.org>
Signed-Off-By: Tony Vroon <chainsaw@gentoo.org>
Package-Manager: Portage-2.3.62, Repoman-2.3.11