Bug 1417280 - Use shutil.move to move grcov output file instead of os.rename. r=me

os.rename doesn't work if dst and src are on different filesystems.

--HG--
extra : histedit_source : 6396f787cdbfbd085fac60fb7d520aaaddacff67

testing/mozharness/mozharness/mozilla/testing/codecoverage.py

@@ -192,7 +192,7 @@ class CodeCoverageMixin(object):
                 return_type='files'
             )
             output_file_name = 'grcov_lcov_output.info'
-            os.rename(grcov_output, os.path.join(self.grcov_dir, output_file_name))
+            shutil.move(grcov_output, os.path.join(self.grcov_dir, output_file_name))
 
             # Zip the grcov output and upload it.
             self.run_command(