chromiumos-assets: change boot_message background color

The boot message background color should match the color filled by ply-image for
boot splash (changed from White to 0xfefefe)

BUG=chromium-os:20671
TEST=display_boot_message enter_dev1 en # background is smooth 0xfefefe

Change-Id: Id56a6b66625c1759e1fe63ee51863b1da91c5d63
Reviewed-on: http://gerrit.chromium.org/gerrit/8726
Reviewed-by: Daniel Erat <derat@chromium.org>
Tested-by: Hung-Te Lin <hungte@chromium.org>
diff --git a/images/boot_message.png b/images/boot_message.png
index c2e70ee..85b0873 100644
--- a/images/boot_message.png
+++ b/images/boot_message.png
Binary files differ