vlc: enable to run as root

A number of embedded systems only include the root user, so this patch
changes the VLC package so that running VLC as root is allowed, like
it is for all other Buildroot packages.

[Thomas: tweak commit log, remove incorrect Tested-by.]

Signed-off-by: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>