Rob Bradford cac42301f8 performance-metrics: Produce some error messages if git commands fail
It is reasonable for these to fail as it the tool could be run outside
of a git repository but by not giving any error message we cannot see
issues when we expect the report to have the git details.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2022-06-10 17:20:13 +01:00
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