update meta-variscite-mx6ul-mx7 to gcc6 fixes for kernel and u-boot
update meta-variscite-mx6ul-mx7 to gcc6 fixes for kernel and u-boot

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

kraj/oe-build,cbrake/oe-build