the android library path in proj.andriod/project.properties file is wrong

if you run the following command in your game forder 

cocos run -p android

it will give you the following error since the path is wrong

BUILD FAILED
/Users/lifeng/dev/adt_bundle_mac/sdk/tools/ant/build.xml:459: ../../../cocos/platform/android/java resolve to a path with no project.properties file for project /Users/lifeng/study/cosco2dx/MyFirstGame/proj.android