Bug#718225: live-build should authenticate files it downloads

[jnqnfe <jnqnfe@gmail.com>]

Small additional patch attached to correct wrong usage string in new
init flush-cache script (copy & paste error when creating new file).

commit c06f050e345bb7bd0e8cc306de6c7b18595343bd
Author: jnqnfe <jnqnfe@gmail.com>
Date:   Tue Jan 6 01:21:39 2015 +0000

    Fix wrong usage specified for init flush-cache script

diff --git a/scripts/build/init_flush-cache b/scripts/build/init_flush-cache
index 1fbcc51..2ddab01 100644
--- a/scripts/build/init_flush-cache
+++ b/scripts/build/init_flush-cache
@@ -16,7 +16,7 @@ set -e
 # Setting static variables
 DESCRIPTION="$(Echo 'flushes out certain old cached data if requested')"
 HELP=""
-USAGE="${PROGRAM} {install|install-binary|remove} [--force]"
+USAGE="${PROGRAM} [--force]"
 
 Arguments "${@}"