Move Dalvik Cache

[captkkk]

This method will cause device like Dell Venue (running on 2.2) died on start up with lots of exception errors, basically all startup apps failed and the Dell Stage UI died as well, but luckily, the adb shell still works, so I can reverse everything.
What a pity, the data folder once showed an increase on size and the symlink did work, but the Dell Stage somehow doesn't like the symlink and hence all widgets and startup died miserably.