net-im/telegram-desktop: Update to 2.4.4

Update to 2.4.4. Noticeable changes:

• Add NDEBUG to CXXFLAGS. This disables DCHECKs and allows video calls to work.
• Change to cmake for rlottie and tg_owt. When they can be packaged properly, we may revert this patch and use separately packaged ports for them.

Changelog:
2.4.4 (23.10.20)

• Fix application quit on call end with main window hidden in tray.
• Update OpenAL library on Windows.
• Several crash fixes.

2.4.3 (07.10.20)

• Fix sending voice messages in scheduled messages section.
• Fix deleting profile / group / channel photos.
• Several crash fixes.

2.4.2 (02.10.20)

• Allow block, report and delete all message from user from "user joined" service message context menu.
• Fix admin badge display in groups.
• Fix loading and opening of comments in channels.

2.4.1 (01.10.20)

• Move by PageUp and PageDown in channel comments.
• Several layout bugfixes.
• Several crashfixes.

2.4 (30.09.20)

• Turn on "Remain Anonymous" in an admin's Permissions to let them post on behalf of the group and become invisible in the list of members.
• Comment on posts in channels that have a discussion group.
• Get notified about replies to your comments via the new Replies chat (if you are not a member of the discussion group).

PR: 250393
Submitted by: Henry Hu (maintainer)
Reported by: Volodymyr Kostyrko