Issue: replace cc._pConst to cc.p
Closed #4581: Replace cc._pConst and cc._sizeConst to cc.p and cc.size
Closed #4581: update the reference of Samples submodule
Merge pull request #1724 from dingpinglv/Iss_ReplacePConst

Closed #4581: Replace cc._pConst and cc._sizeConst to cc.p and cc.size