devtool: upgrade: fix error of import recipeutils

upgrade.py imports oe.recipeutils in meta/lib/ but path to oe.recipeutils
is not provided. This fails populate_sdk_ext.

(From OE-Core rev: 5f140359f859fea9cfe8c8d9c9584bceec875adb)

Signed-off-by: Luck Hoang <huyht1205@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/devtool/upgrade.py

@@ -27,6 +27,10 @@ import argparse
 import scriptutils
 import errno
 import bb
+
+devtool_path = os.path.dirname(os.path.realpath(__file__)) + '/../../../meta/lib'
+sys.path = sys.path + [devtool_path]
+
 import oe.recipeutils
 from devtool import standard
 from devtool import exec_build_env_command, setup_tinfoil, DevtoolError, parse_recipe, use_external_build