Chroma key filter test now skipped on low-powered GPUs.
Chroma key filter test now skipped on low-powered GPUs.

svn path=/trunk/libavg/; revision=5209

hoodie/libavg,hoodie/libavg,hoodie/libavg,scotty007/libavg,libavg/libavg,libavg/libavg,scotty007/libavg,th3infinity/libavg,scotty007/libavg,scotty007/libavg,yyd01245/libavg,yyd01245/libavg,hoodie/libavg,yyd01245/libavg,yyd01245/libavg,th3infinity/libavg,libavg/libavg,th3infinity/libavg,libavg/libavg,th3infinity/libavg