add cmemory.info() returns a table of c memory info

service/cmemory.lua

@@ -2,7 +2,11 @@ local skynet = require "skynet"
 local memory = require "memory"
 
 memory.dumpinfo()
-memory.dump()
+--memory.dump()
+local info = memory.info()
+for k,v in pairs(info) do
+	print(string.format(":%08x %gK",k,v/1024))
+end
 
 print("Total memory:", memory.total())
 print("Total block:", memory.block())