The cve-2018-15664-* patches come from upstream, but the tests units
were removed, as they require root.
I find it a bit misleading to have modified version of upstream patches,
especially if there's no message in the patch header indicating that the
patches were modified.
This commit brings the patches back to their original form, identical
to upstream, and introduce a third patch to disable the tests if user is
Signed-off-by: Arnaud Rebillout <email@example.com>