Gcc: Upstream Patch

The accepted upstream patch is mildly different to the one we currently ship for Yosemite, most notably because the upstream patch doesn’t touch libsanitizer.
Let's use a commit hash instead of of 'master' (otherwise, if you modify the file in the future, it won't match the checksum anymore).

If you go to https://github.com/DomT4/scripts/blob/master/Homebrew_Resources/Gcc/gcc1010.diff and press 'y', it will reload with a canonical URL, and then you can click 'raw' from there. It ends up being:

https://raw.githubusercontent.com/DomT4/scripts/6c0e4892107a2913ebf3de423fc1f42cadfa0b88/Homebrew_Resources/Gcc/gcc1010.diff