[Dev] [PATCH] libre/marble: update marble-common to 20.12.1

[dllud]

marble-qt is again failing to launch with a symbol lookup error due to
the outdated marble-common. This patch brings in the latest version of
marble-common from Arch, while still building it without qt5-webengine.

Built and tested on x86_64. Patch as attachment.

For background info check Bug #2779:
https://labs.parabola.nu/issues/2779
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