lua: print a random IMEI from the seed provided

I don't know how much stronger we can see the LUA RNG. It seems to
accept an "int" which I assume is 32 bit. It will complain if the seed
is too big.

files/lib/blue-merle/luhn.lua

@@ -56,4 +56,6 @@ function make_random_imei ()
 	return imei
 end
 
-print (make_imei ("354809108035177"))
+math.randomseed(tonumber(arg[1]))
+
+print (make_random_imei ())