directfb-examples: install rose.png for df_dok

The directfb example program df_dok now requires rose.png to be
installed, otherwise it gives the following error:

(#) DirectFBError [dfb->CreateImageProvider( dfb, DATADIR"/rose.png", &provider )]: A general or unknown error occured

Therefore add rose.png to the list of data files if df_dok is enabled.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/directfb-examples/directfb-examples.mk

@@ -58,6 +58,7 @@ DIRECTFB_EXAMPLES_DATA_$(BR2_PACKAGE_DIRECTFB_EXAMPLES_DOK) += usr/share/directf
 DIRECTFB_EXAMPLES_DATA_$(BR2_PACKAGE_DIRECTFB_EXAMPLES_DOK) += usr/share/directfb-examples/intro.png
 DIRECTFB_EXAMPLES_DATA_$(BR2_PACKAGE_DIRECTFB_EXAMPLES_DOK) += usr/share/directfb-examples/fish.png
 DIRECTFB_EXAMPLES_DATA_$(BR2_PACKAGE_DIRECTFB_EXAMPLES_DOK) += usr/share/directfb-examples/swirl.png
+DIRECTFB_EXAMPLES_DATA_$(BR2_PACKAGE_DIRECTFB_EXAMPLES_DOK) += usr/share/directfb-examples/rose.png
 
 DIRECTFB_EXAMPLES_DATA_$(BR2_PACKAGE_DIRECTFB_EXAMPLES_DRIVERTEST) += usr/share/directfb-examples/pngtest.png
 DIRECTFB_EXAMPLES_DATA_$(BR2_PACKAGE_DIRECTFB_EXAMPLES_DRIVERTEST) += usr/share/directfb-examples/testmask.png