tests/icles/: Visual test for videocrop, shows that packed yuv doesn't work right yet. --with-ffmpegcolorspace option...

Original commit message from CVS:
* tests/icles/.cvsignore:
* tests/icles/Makefile.am:
* tests/icles/videocrop-test.c: (quit_mainloop), (tick_cb),
(test_with_caps), (video_crop_get_test_caps), (main):
Visual test for videocrop, shows that packed yuv doesn't work right
yet. --with-ffmpegcolorspace option doesn't work yet for unknown
reasons (another basetransform issue?)