snarfer: disable during build

Don't want to require X11 during OS X build anymore.

R=rsc
http://codereview.appspot.com/6531045

src/cmd/mkfile

diff --git a/src/cmd/mkfile b/src/cmd/mkfile
index 0657fcc..9541f5c 100644
--- a/src/cmd/mkfile
+++ b/src/cmd/mkfile
@@ -4,7 +4,7 @@
 
 <$PLAN9/src/mkmany
 
-BUGGERED='CVS|faces|factotum|lp|ip|mailfs|upas|vncv|mnihongo|mpm|index|u9fs|secstore|smugfs'
+BUGGERED='CVS|faces|factotum|lp|ip|mailfs|upas|vncv|mnihongo|mpm|index|u9fs|secstore|smugfs|snarfer'
 DIRS=lex `ls -l |sed -n 's/^d.* //p' |egrep -v "^($BUGGERED)$"|egrep -v '^lex$'`
 
 <$PLAN9/src/mkdirs