[WIP] Enable zipped sketch with embedded libraries

[facchinm]

Works in conjunction with arduino/arduino-builder#223

[ArduinoBot]

✅ Build completed.

Please test this code using one of the following:

⬇️ http://downloads.arduino.cc/javaide/pull_requests/arduino-PR-6114-BUILD-722-linux32.tar.xz
⬇️ http://downloads.arduino.cc/javaide/pull_requests/arduino-PR-6114-BUILD-722-linux64.tar.xz
⬇️ http://downloads.arduino.cc/javaide/pull_requests/arduino-PR-6114-BUILD-722-windows.zip
⬇️ http://downloads.arduino.cc/javaide/pull_requests/arduino-PR-6114-BUILD-722-macosx.zip
⬇️ http://downloads.arduino.cc/javaide/pull_requests/arduino-PR-6114-BUILD-722-linuxarm.tar.xz

ℹ️ The linuxarm build is still experimental and may not be always available.

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