Branch for freertos changed

FreeRTOS switched to use main branch instead of master while our code
still looks for master. Overriding of bb class is needed for the change
thus it requires change in the order of layers.

Closes: https://git.ostc-eu.org/OSTC/OHOS/meta-ohos/-/issues/132


Signed-off-by: Pavel Zhukov <pavel.zhukov@huawei.com>
Upstream status: Backport
Upstream commit: d4bd9d748a4223856bf92dd35ca088d1f319d189