Accton AS5710_54X: Add to support ONIE

Signed-off-by: Curt Brune <curt@cumulusnetworks.com>
crosstool-NG: Make linux-custom be able to apply patches

Signed-off-by: Curt Brune <curt@cumulusnetworks.com>
crosstool-NG: Add patch to fix install_headers argument too long for linux-fsl-sdk-v1.5

Signed-off-by: Curt Brune <curt@cumulusnetworks.com>