fixed 3d94a832 from https://gitee.com/aodongbiao/build_lite/pulls/618

add config's path into system path
Signed-off-by: Nlubinglun <lubinglun@huawei.com>
Change-Id: I6e0aac836869e7e46629898e41bdcfe25616f796

hb_internal/common/config.py

@@ -16,9 +16,10 @@
 # limitations under the License.
 
 import os
+import sys
 import platform
 from distutils.spawn import find_executable
-
+sys.path.append(os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))))
 from hb_internal import CONFIG_JSON
 from hb_internal import CONFIG_STRUCT
 from hb_internal import BUILD_TOOLS_CFG