run-tests: convert the remaining os.system() call to Unicode
I wasn't able to hit this path in
543a788eea2d, but I have now when I
accidentally left off `--local`.
--- a/tests/run-tests.py Sat Sep 15 13:31:41 2018 -0400
+++ b/tests/run-tests.py Sun Sep 16 23:13:05 2018 -0400
@@ -2976,7 +2976,7 @@
makedirs(self._bindir)
vlog("# Running", cmd)
- if os.system(cmd) == 0:
+ if os.system(_strpath(cmd)) == 0:
if not self.options.verbose:
try:
os.remove(installerrs)