Commit files for initial source layout.

Provides basic build rules, empty implementation and tests to NFC daemon.

Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org>
BUG=chromium:240998
TEST=sudo FEATURES="test" emerge nfcd && FEATURES="test" emerge-link nfcd

Change-Id: I74f98f3c5669744f096b5b583d8c6adbdc7ec65d