oe-build-perf-test: pre-check Git repo when using --commit-results
Do a pre-check on the path that is specified with --commit-results
before running any tests. The script will create and/or initialize a
fresh Git repository if the given directory does not exist or if it is
an empty directory. It fails if it finds a non-empty directory that is
not a Git repository.
Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
