AndEngineExamples: Gravity to right instead of bottom on ASUS EEEpad transformer prime

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Start Physics example 'Using Physics' or 'Using RevoluteJoint'
2. Add some items

What is the expected output? What do you see instead?
Gravity should be to 'bottom' depending how tablet is turned. Gravity pulls 
objects to the 'right' when tablet is turned.

What version of the product are you using? On what operating system?
AndEngineExamples 1.3.6
Android 4.0.3
Model: ASUS Transformer Prime TF201
Device: TF201-0x9900

Please provide any additional information below.
Accelerometer works 'correctly' during screen rotation.

Great engine anyway!

Original issue reported on code.google.com by nicjdevr...@gmail.com on 19 Sep 2012 at 1:10