Debian: Assign the sysroot ostree remote to the feed

These changes are to support ostree pull that take place
as a part of host-install step.
The ostree commands used by patching require these entries.

Replacing the sysroot ostree config entry:
[remote "debian"]
url=file://NOT_SET

with:
[remote "debian"]
url=file:///var/www/pages/feed/rel{VER}/ostree_repo/
branches:starlingx;

Test Plan:
  Build / Boot / Bootstrap / Unlock / Reboot  AIO-SX
  Verify no patch alarms

Story: 2009969
Task: 45437
Signed-off-by: Al Bailey <al.bailey@windriver.com>
Change-Id: I71f7c791a7f36e9d1480b7479a5bfc55f372d358

kickstart/files/kickstart.cfg

@@ -1981,6 +1981,16 @@ if [ "${controller}" = true -a ${OSTREE_REPO_FETCHED} -eq 0 ] ; then
         fi
         ostree --repo=${repo} pull ${pull_options} ${instbr}:${instbr}
 
+        # This is used by patching
+        # - change the sysroot remote from NOT_SET to the new feed location
+        if [ "${insturl}" = "file://NOT_SET" ] ; then
+            file_feed="file:///var/www/pages/feed/rel-${sw_release}/ostree_repo/"
+            feed_branch="starlingx"
+            ilog "Replacing ostree sysroot remote with: ${file_feed} ${feed_branch}"
+            ostree --repo=/sysroot/ostree/repo remote delete ${instname}
+            ostree --repo=/sysroot/ostree/repo remote add ${instname} ${file_feed} ${feed_branch}
+        fi
+
         # TODO: Figure out a way on the second run /sysroot/ostree/2
         #       to avoid this error string
         #