[openload] Don't use bare except when removing temp files

youtube_dl/extractor/openload.py

@@ -140,7 +140,7 @@ class PhantomJSwrapper(object):
         for name in self._TMP_FILE_NAMES:
             try:
                 os.remove(self._TMP_FILES[name].name)
-            except:
+            except (IOError, OSError):
                 pass
 
     def _save_cookies(self, url):