Jim Mussared 6873a14b61 py/makeversionhdr.py: Allow running outside of repo. ...

If a CMake-build is run with `make BUILD=/outside/path` then
makeversionheader.py is run with the CWD set to the build directory, which
means the git version lookup will fail and silently fall back to the
mpconfig.h mode (giving the wrong result).

This commit:
 - Uses the location of makeversionheader.py to find the repo path.
 - Allows overriding this path via --repo-path.

This work was funded through GitHub Sponsors.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

2022-11-22 14:36:21 +11:00

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