Merge pull request #77 from dtroyer/usb-syslinux

Fix handling of new USB devices

tools/build_usb_boot.sh

@@ -21,11 +21,14 @@ if [ -b $DEST_DIR ]; then
     # We have a block device, install syslinux and mount it
     DEST_DEV=$DEST_DIR
     DEST_DIR=`mktemp -d mntXXXXXX`
+    mount $DEST_DEV $DEST_DIR
+
+    if [ ! -d $DEST_DIR/syslinux ]; then
+        mkdir -p $DEST_DIR/syslinux
+    fi
 
     # Install syslinux on the device
     syslinux --install --directory syslinux $DEST_DEV
-
-    mount $DEST_DEV $DEST_DIR
 else
     # We have a directory (for sanity checking output)
     DEST_DEV=""