Fixing minor Android project linking issues to ofxAndroid

Fixes fixed path to relative path.

Issue:
`/Users/welovecode/Documents/openFrameworks_git/addons/ofxAndroid`
Change to :
`PARENT-2-PROJECT_LOC/addons/ofxAndroid`
Where `PARENT-2-PROJECT` == `../../`  (back 2 directories from the project directory)