leaderd: add leaderd into webservd's group

Adding leaderd in webservd's group allows
leaderd to register web request handlers
with webservd.

BUG=brillo:279
TEST=build image, deploy on device and test
CQ-DEPEND=CL:261948

Change-Id: I1f08400ee4b9e01be1207d5a1fb0af46864f05ce
Reviewed-on: https://chromium-review.googlesource.com/261950
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: David Tapuska <dtapuska@chromium.org>
Tested-by: David Tapuska <dtapuska@chromium.org>
diff --git a/profiles/base/accounts/group/webservd b/profiles/base/accounts/group/webservd
index 9e93c69..32fac39 100644
--- a/profiles/base/accounts/group/webservd
+++ b/profiles/base/accounts/group/webservd
@@ -1,3 +1,3 @@
 group:webservd
 gid:266
-users:privetd,webservd
+users:leaderd,privetd,webservd