Add esp-idf port sources to example compatible with QP-C v7.3.4#4

FrancoisB-HEX wants to merge 2 commits intoQuantumLeaps:mainQuantumLeaps/qpc-examples:mainfrom

FrancoisB-HEX:esp-idf-portFrancoisB-HEX/qpc-examples:esp-idf-portCopy head branch name to clipboard