manifest: openthread upmerge up to commit 1f1a826

Regular OpenThread upmerge.

Added new configs:
CONFIG_OPENTHREAD_TCP -> OT_TCP
CONFIG_OPENTHREAD_DNS_QUERY_UPSTREAM -> OT_DNS_QUERY_UPSTREAM
CONFIG_OPENTHREAD_MESH_DIAG -> OT_MESH_DIAG

Signed-off-by: Mariusz Poslinski <mariusz.poslinski@nordicsemi.no>
4 files changed