Using https://gitlab.freedesktop.org/mobile-broadband/ModemManager.git to download the source code.
Added compile option to compile qrtr support.
Enabled lto and additional gcc flags for perfomance and less size.
Modified to use meson as upstream has abandoned autotools.
Removed BUILD_PARALLEL options. These are default with ninja/meson.

Signed-off-by: Maxim Anisimov <maxim.anisimov.ua@gmail.com>
(cherry picked from commit 6ae8b15d68)

Remove upstreamed patch.

Signed-off-by: Kuan-Yi Li <kyli@abysm.org>

The included patch corrects an issue preventing udev rules from
being parsed correctly. [1][2]

This patch should not be needed after the next release. [3]

More information:
[1] e9f254ba3f
[2] https://lists.freedesktop.org/archives/modemmanager-devel/2021-December/009024.html
[3] https://lists.freedesktop.org/archives/modemmanager-devel/2021-December/009022.html

Signed-off-by: Nicholas Smith <nicholas@nbembedded.com>