system_api: install cros_healthd header.

Specify installation of cros_healthd/dbus-constants.h in the
system_api EBUILD.

Cq-Depend: chromium:1578363
BUG=b:128683357
TEST=build system_api

Change-Id: Ida8f8b8905c092b5fe835a4baf0aa400284dd4a6
Signed-off-by: Paul Moy <pmoy@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1574505
Reviewed-by: Will Bradley <wbbradley@chromium.org>
Reviewed-by: Polina Bondarenko <pbond@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed