I compiled the results imx_Android4.4.2_r1.tar (boot.img, recovery.img, system.img, buboot.bin, u-boot-mx6q.bin) to obtain the file.
And try to download using the MFG TOOL in eMMC memory of the SABRE EVB.
I do not know why that is generated u-boot-mx6q.bin.
In order to download u-boot-6q.bin file it is required. Please.. Tell us how to fix the problem sounds like a compilation pass.