Change domain from opencord.org to lfbroadband.org

We have moved all sites from the opencord.org domain to
lfbroadband.org (except wiki/Jira, which are now hosted on Atlassian
Cloud).

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: I9624ae92e9c193fa2d2fac9ab30ad108a812306e
diff --git a/Makefile b/Makefile
index fd90308..16e41a9 100644
--- a/Makefile
+++ b/Makefile
@@ -132,7 +132,7 @@
 CHECKOUT_REPOS   = $(foreach repo,$(OTHER_REPO_DOCS),repos/$(repo))
 
 # Host holding the git server
-REPO_HOST       ?= https://gerrit.opencord.org
+REPO_HOST       ?= https://gerrit.lfbroadband.org
 
 # For QA patchset validation - set SKIP_CHECKOUT to the repo name and
 # pre-populate it under repos/ with the specific commit to being validated