Patch bundle install in CentOS 6 to install sassc gem using newer GCC
This is a follow up on the effort to merge https://gitlab.com/gitlab-org/gitlab-ce/issues/18432
We've enabled new GCC on CentOS 6 as part of gitlab-omnibus-builder!94 (merged) this code switches ENV variables when gem installing sassc to use that GCC installation instead of the default one
Closes #4196 (closed)
Edited by GitLab Release Tools Bot