Makefile: Add 'stats:' target

Currently, only buildall can print flash space stats.

This patch adds 'stats:' target, which prints the smallest flash spaces.
This target can print flash stats without running other recipes
associated with buildall.

Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>

BUG=none
BRANCH=none
TEST=make stats

Change-Id: I30e0cb7cda60c4309212024a7b842f6b37d836ff
Reviewed-on: https://chromium-review.googlesource.com/1554842
Commit-Ready: Daisuke Nojiri <dnojiri@chromium.org>
Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
1 file changed