Q-Chem fix os.mkdir -> os.makedirs (#293)

* fix os.mkdir -> os.makedirs

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Co-authored-by: Janosh Riebesell <janosh.riebesell@gmail.com>

custodian/qchem/jobs.py

@@ -162,7 +162,7 @@ def run(self):
             os.mkdir(local_scratch)
             shutil.move(os.path.join(os.environ["QCSCRATCH"], "132.0"), local_scratch)
         if os.path.exists(os.path.join(os.environ["QCSCRATCH"], "53.0")):
-            os.mkdir(local_scratch, exist_ok=True)
+            os.makedirs(local_scratch, exist_ok=True)
             shutil.move(os.path.join(os.environ["QCSCRATCH"], "53.0"), local_scratch)
         with open(self.qclog_file, "w") as qclog:
             return subprocess.Popen(self.current_command, stdout=qclog, shell=True)  # pylint: disable=R1732