buildroot

imx-usb-loader: bump version

Main additions are:
- Support for i.MX6SX, i.MX6UL and i.MX7
- Support for secure booting on i.MX6/i.MX7
- Various bug fixes

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>