bundle main HOL image only, to save about 300 MB disk space;

--- a/Admin/makebin	Fri Jan 14 18:23:39 2011 +0100
+++ b/Admin/makebin	Fri Jan 14 20:22:27 2011 +0100
@@ -100,9 +100,7 @@
 if [ -n "$DO_LIBRARY" ]; then
   ./build -bait
 else
-  ./build -b -m HOL-Nominal HOL
-  ./build -b -m HOLCF HOL
-  ./build -b ZF
+  ./build -b HOL
 fi