Add support for new Arduino libraries path

[stardiviner]

Currently Linux Arduino IDE install sketch libraries in ~/Arduino/libraries/. The structure is ~/Arduino/libraries/<sketch>/src/{*.cpp, *.h}.
I check out company-arduino, seems does not support this path.

[stardiviner]

As this article said. Arduino v17 use a new location.
https://learn.adafruit.com/arduino-tips-tricks-and-techniques/arduino-libraries

In Arduino v16 and earlier, libraries were stored in the ArduinoInstallDirectory/hardware/libraries folder, which also contained all the built-in libraries (like Wire and Serial).

In v17 and up, the user libraries are now stored in the ArduinoSketchDirectory/libraries folder. You may need to make the libraries sub-folder the first time. However, the good thing about this is you wont have to move & reinstall your libraries every time you upgrade the software.

[wuliuxiansheng]

Is this feature going to be considered? I think this is a very useful feature.

[yuutayamada]

I'm sorry super delayed response. I'm gladly merge PR if someone make this happens. I'm not using arduino now.

[stardiviner]

I actually did have a dig deep in company-arduino source code before about how to add this support. But I can't implement it with my little Elisp skill.

[wuliuxiansheng]

I may submit a PR soon to add this feature. A quick fix for this is to modify irony-arduino-includes-options after you load company-arduino.

[stardiviner]

I pushed a new PR #7
@yuutayamada

[jcs090218]

Any update on this?