Disable GCC 5.2's new -Wdiscarded-array-qualifiers warning for GRUB
Disable GCC 5.2's new -Wdiscarded-array-qualifiers warning for GRUB

GRUB uses -Werror, and the GRUB 2.00 snapshot we use doesn't satisfy this
warning.  Pass -Wno-discarded-array-qualifiers to configure to disable
the warning.

biosbits/bits,biosbits/bits,biosbits/bits,ii0/bits,ii0/bits,ii0/bits,biosbits/bits,ii0/bits