APT source whitelist request for gfortran

[js850]

e.g. on ubuntu

sudo apt-get install gfortran

[cbcoutinho]

Instead of creating a new issue, I just want to update on here

gfortran is now included and it's possible to use in a build. All of the gcc compilers are on the whitelist, including gfortran-6, but when I attempt to use it to build my package I run into an error:

E: Unable to locate package gfortran-6

Regular gfortran works (resulting in version 4.6)