use cord-2.0. This applies to cord-2.0 only -- do not apply this patch to master

Change-Id: Ib5ffd7323d01e3fca789c923a868e556cc09eb55
diff --git a/common/Makedefs b/common/Makedefs
index c7a808d..8c409d9 100644
--- a/common/Makedefs
+++ b/common/Makedefs
@@ -27,7 +27,7 @@
 
 # git repos
 CORD_BASE_GIT_URL ?= https://gerrit.opencord.org/p
-DEFAULT_BRANCH ?= master
+DEFAULT_BRANCH ?= cord-2.0
 
 XOS_BRANCH ?= $(DEFAULT_BRANCH)
 XOS_GIT_URL ?= $(CORD_BASE_GIT_URL)/xos.git