Thanks for reporting this. Is the diff file missing? If so, this is a mistake in the automatik generation of the source archives and i think nobody noticeded. We will fix this for the next SDK but if you need the diff in the meanwhile, please let me know.
Thank you for getting back so quickly!
In the archive there is three gcc folders: gcc (2.95), gcc4 and gcc5
each of them contains the source + patch/diff files.
The gcc6 folder is missing, and so is the patch. So if you can send me the patch somehow that would be great! =)