testing/gxlimg: new aport
gxlimg is a boot image creation tool for Amlogic's GXL and G12A/G12B SoCs, which replaces the proprietary aml_encrypt binary utilities. It is used for creating a boot image with Amlogic firmware and U-Boot, suitable for booting on Amlogic boards.
Signed-off-by: Ferass El Hafidi funderscore@postmarketos.org