Cluster demo support updates

Cluster demo support updates

Changes include:
- Add agl-weston-remoting feature that sets "weston-remoting" distro
  feature. The intent is to replace agl-gstrecorder in meta-agl-devel
  with something more generic.
- Add weston remoting initialization timing patch to weston bbappend
  in meta-agl-profile-graphical, conditional on "weston-remoting"
  distro feature.
- The 0004-unconditionally-include-mman.h.patch weston patch is no
  longer required after the SMACK labeling changes, remove it as
  cleanup.
- Enable the weston "remoting" PACKAGECONFIG in weston bbappend, also
  conditional on "weston-remoting". A redefinition of the "remoting"
  PACKAGECONFIG option is required to fix a recipe bug that will have
  a fix sent upstream.
- Rename virtualoutput.cfg weston.ini fragment to remote-output.cfg
  to better reflect its current contents.

Bug-AGL: SPEC-3395

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: I9c0579670d81296492b3b8bed93aafb3f7ffc15c
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/24567
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-boot-test: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>