[RCAR] Fix cluster-demo image build for RCAR board

[RCAR] Fix cluster-demo image build for RCAR board

* For  the agl-cluster-demo-platform image we need to apply a patch
  on gstreamer1.0-plugins-bad package. For now the RCAR was exclude, for
  an unkwon reason.

Bug-AGL: SPEC-3632

Signed-off-by: Ronan Le Martret <ronan.lemartret@iot.bzh>
Change-Id: Ib94edf4717184946dfa20a5319d171757027ce4e
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/25442
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>