tree a319a2a7c13af15a192198aa88f487d5db6fe850
parent 2b2f7d3551c6660bfde8eb41718abd8cbff2ec63
author Greg Hackmann <ghackmann@google.com> 1476997490 -0700
committer Greg Hackmann <ghackmann@google.com> 1476997938 -0700

bootloader: add DEBUG make flag

make DEBUG=1 tells uefi-build.sh to build the DEBUG target, which adds
lots of diagnostic messages that can be useful for people debugging
firmware or early-boot issues (e.g. register dumps in the default
exception handler).

Test: build and flash bootloader images built with and without DEBUG=1
Change-Id: Ic34f5dcc24336a166f15e260ebc88796f8701291
Signed-off-by: Greg Hackmann <ghackmann@google.com>