Contribute back our version of the flag of Hungary

[Wyatt OʼDay]

See commit de8e836

Update Flag of Hungary (use Pantone colors from "MSZ 1361:2009 – A nemzeti zászló és lobogó követelményei / Requirements for national flag and waving").

https://web.archive.org/web/20150812130850/http://www.tmte.hu/11kiadvanyok/111matete/111_2009_05_pdf/203_Zaszlo.pdf

PANTONE 18-1660 TCX, https://www.pantone.com/color-finder/18-1660-TCX

Hex: #CE2939

PANTONE 18-6320 TCX, https://www.pantone.com/color-finder/18-6320-TCX

Hex: #477050

Contribute back these changes here: https://commons.wikimedia.org/wiki/File:Flag_of_Hungary.svg