Update license boilerplate text in source code files

Normally we don't do this, but enough changes have accumulated that
we're doing a tree-wide one-off update of the name & style.

BUG=chromium:1098010
TEST=`repo upload` works

Change-Id: Ibd0b553ccf858f946a9735be24d3529742c56a0a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/4148327
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Gilberto Contreras <gcontreras@google.com>
7 files changed