tree c12755d5029137f1f730978cdb8217ff7d345d47
parent 431992fc7f1acb78035e09d748f9a9480d1e0836
author Alex Deymo <deymo@google.com> 1440474421 -0700
committer Alex Deymo <deymo@google.com> 1440474918 -0700

Build update_engine from the new directory path.

The update_engine ebuild recreates the old directory structure placing
update_engine as a subdirectory of platform2 in the build environment.
This structure doesn't match the current location of the code and
breaks incremental builds creating symlinks to update_engine in
platform2/ and even in the new update_engine directory.

This patch modifies the .gyp file to reference platform2 sources via
the platform2_root gyp variable and builds update_engine from the new
path. This fixes incremental builds.

For this change to take effect in Chrome OS, the ebuild file is updated
in a separated CL.

BUG=None
TEST=emerge-link update_engine; cros_workon_make update_engine

Change-Id: Icedd344df5c36b0d6ce07bb5c7714eed4e87e590