meta-agl-bsp: imx6: Update the imx6sabreauto machine template

meta-agl-bsp: imx6: Update the imx6sabreauto machine template

* Chnage the Weston provider to Weston 2.0

Bug-AGL: SPEC-905

Change-Id: I164285dfb63491f2164d667fc51f64b66e5cee27
Signed-off-by: Mihail Grigorov <michael.grigorov@konsulko.com>
Signed-off-by: Georgi Vlaev <georgi.vlaev@konsulko.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/11309
Reviewed-by: Leon Anavi <leon.anavi@konsulko.com>
Reviewed-by: Thomas Rini <trini@konsulko.com>
Reviewed-by: Matt Ranostay <matt.ranostay@konsulko.com>
Reviewed-by: Matt Porter <mporter@konsulko.com>
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>