Add libftdi build and add mingw64 build.#20

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darkautism wants to merge 7 commits intoarduino:masterfrom

darkautism:master

Commits on Mar 7, 2020

Add libftdi build and add mingw64 build.
darkautism
committed

Commits on Mar 9, 2020

Prevent avrdude say: libwinpthread-1.dll no found error when build by mingw
darkautism
committed

Commits on Mar 10, 2020

Commits on Mar 11, 2020