cmake: Better handling of git

gonetz / GLideN64

A new generation, open-source graphics plugin for N64 emulators.

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Closed orbea closed 2 years ago

orbea commented 2 years ago

This fixes some problems:

When building out of tree the git command will work in the wrong directory.
The user may not actually have git installed.
The source tree may not actually have the .git directory, for example when downloading a source archive from github.