Summary:
CoreCLR, the runtime of dotnet, has some issues regarding storing
environment variables (see dotnet/coreclr issue #15812), keeping them in
a local cache instead of flushing to the native `setenv`.
This commit replaces the usage of
`System.Environment.SetEnvironmentVariable` with a `setenv` wrapper.
Test Plan: Run without DISPLAY set and with dotnet.
Reviewers: felipealmeida, brunobelo, segfaultxavi, YOhoho
Reviewed By: brunobelo
Subscribers: cedric, #reviewers, #committers
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D10619
77207f9b58