Move clean_pyc() before install_rc in the postinstall

install_rc() triggers the pushasset, which will benefit from the purged
python bytecode files.

bin/postinstall

@@ -1265,6 +1265,7 @@ try:
     missing_dirs()
     convert_svclinks()
     install_cron()
+    clean_pyc()
     install_rc()
     gen_keys()
     install_profile()
@@ -1278,7 +1279,6 @@ try:
     convert_to_lsb()
     move_env_to_conf()
     move_var_files_19()
-    clean_pyc()
     dump_install_content()
     restart_daemon()
     init_secret()