weston.ini: Add virtual display and record for CES2017 demo

weston.ini: Add virtual display and record for CES2017 demo

In order to support IVI-Cluster demo, set virtual display
and gst-recorder parameter in weston.ini.

v2:
 If you want to use virtual output system, set "virtual-display"
in DISTRO_FEATURES. Then the sample value is enabled.
 If you want to use transfer system to multi ECU via H.264,
set "gst-record" in DISTRO_FEATURES.

Note:
 These system are supported in R-Car M3 only.

Change-Id: Ia782d3bc7079c38f30be52c1f6f152d55e1d2e17
Signed-off-by: Harunobu Kurokawa <harunobu.kurokawa.dn@renesas.com>