Added c++ linker command to allow to include libstdc++ when linking.#838

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helmut64 wants to merge 5 commits intoespressif:masterfrom

helmut64:ESP32_CPP_FIX

Commits on Nov 16, 2017

Commits on Nov 27, 2017

Removed parameters to avoid build errors
helmut64
committed

Commits on Nov 28, 2017

The renaming of map is not needed for the C++ map by using std::map
helmut64
committed