package/libmbim: bump to version 1.26.0

package/libmbim: bump to version 1.26.0

This release introduces meson build system support that fixes
gobject-intorspection issue with autotools.

As meson files are only available in git, switch the location to
https://gitlab.freedesktop.org.

Since 1.26.0 libgudev is not required anymore so drop this dependency.

Add support for bash-completion.

Fixes:
http://autobuild.buildroot.net/results/f8a81aad0e262a567a2b31712575472ae92e5518

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Acked-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>