Usually you would not start that way. You would create a sencha app..
sencha app generate MyApp myAppFolder
then change into the sencha touch folder
cd myAppFolder
sencha cordova init
then change into the cordova folder
cd cordova
cordova platform add android (plugins ....)
go back into the sencha root folder
cd ..
sencha app build native
that's it.
EDIT:
To go for the comment.
You can add an NTFS link (hard link) from the following folder:
senchaRoot/build/package/www
You can write into that folder automatically from the Sencha build process if you edit the file:
appRoot/.sencha/app/defaults.properties
change the following line:
build.dir=${workspace.build.dir}/${build.environment}/www