updated 9-patch graphics of bricks
Merge branch 'master' of https://github.com/Catrobat/DesignAndUsability

Conflicts:
	catroid/bricks/9patch/brick_control_1h.9.png
Merge branch 'master' of https://github.com/Catrobat/DesignAndUsability

Conflicts:
	catroid/bricks/9patch/brick_blue_2h.9.png
	catroid/bricks/9patch/brick_control_1h.9.png