Add description to stylenodes when debug define is present.

Change-Id: I182329a15ac2d7ca5c50e7a943cf4c171cf2562b
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
Add changes file for 5.2.0

Change-Id: If854ec190db1b425078153fd141648c6de2462a2
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>