dev_install: Exclude the var symlink when packaging dev-only files.

When running dev_install, the directory /usr/local/var already exists
so extracting dev-only-extras.tbz2 on /usr/local fails since it
contains "var" as a symlink.

The contents installed in /usr/local/var are already present in the
stateful partition since we created a symlink from there.

BUG=chromium:381886
TEST=`./build_image` creates the .tbz2 file without var symlink.

Change-Id: I5b299398d0b09ef6babd6164b3ae5d47282ad13e
Reviewed-on: https://chromium-review.googlesource.com/245480
Tested-by: Alex Deymo <deymo@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Alex Deymo <deymo@chromium.org>
Trybot-Ready: Alex Deymo <deymo@chromium.org>
1 file changed