Merge the TurboJPEG planar YUV encoding feature from VirtualGL 2.2


git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@305 632fc199-4ca6-4c93-a231-07263d6284db
diff --git a/Makefile.am b/Makefile.am
index 74df225..2f7e773 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -124,6 +124,7 @@
 
 test: testclean all
 	./jpegut
+	./jpegut -yuv
 	./cjpeg -dct int -outfile testoutint.jpg $(srcdir)/testorig.ppm
 	cmp $(srcdir)/testimgint.jpg testoutint.jpg
 	./cjpeg -dct fast -opt -outfile testoutfst.jpg $(srcdir)/testorig.ppm