forgot to commit openos

data/openos/bin/free.lua

@@ -0,0 +1,8 @@
+local computer = require("computer")
+local total = computer.totalMemory()
+local max = 0
+for _=1,40 do
+  max = math.max(max, computer.freeMemory())
+  os.sleep(0) -- invokes gc
+end
+io.write(string.format("Total%12d\nUsed%13d\nFree%13d\n", total, total - max, max))