Subject: Add cc as a symlink to gcc

From: Mohammed Sadiq <[email-masked]>
Date: Thu, 28 Sep 2017 09:59:26 +0530 (IST)

Some packages seems to rely on cc as the C compiler. So within some environment,
let cc be symlinked to the default gcc of the environment.

This may not be noticeable when building/installing a package, because cc may
be used only on rare conditions (like when enabling some disabled tests, etc),
which isn't enabled by default.

Thanks