Currently, it will print the function name as a prefix to the debug
output. Make it so that a null function name won't get printed, so
that it's possible to print little bits of debug output.
BUG=chromium:683391
BRANCH=none
TEST=build_packages --board=reef chromeos-firmware
Change-Id: I1dff38e4d8ab03118e5f8832a16d82c2d2116ec9
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/431111
Reviewed-by: Julius Werner <jwerner@chromium.org>
853ff7176e