libweave: Build libweave as shared library

Added own gyp files of libweave.
Added exports of necessary symbols.
Added own test runner.

CQ-DEPEND=CL:290822
BUG=brillo:1258
TEST='FEATURES=test emerge-gizmo libweave buffet'

Change-Id: I23465c676865bc1dff8d8f54bcdcb097f2894998
Reviewed-on: https://chromium-review.googlesource.com/290907
Tested-by: Vitaly Buka <vitalybuka@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
2 files changed
tree: 52407f33d638569094bdd522ebaf484b44d571fe
  1. buffet/