Download patch
ref: e31bc9746dab3973c7cdff3fe24adee4c20fab19 parent: bfa6b519e6dedf03e6ece23ac93bc57bbf8e6476 author: Marc-Alexandre Espiaut <marcalexandre@member.fsf.org> date: Mon Jun 4 11:32:25 EDT 2018
Removing DOS code _rt_swft.h