Fix README.adoc file not found error on rpm build

README.adoc file name recently changed from README.rst
This patch update the file name and add necessary entries
into MANIFEST.in file for building rpm.

Signed-off-by: Timothy Asir J <tjeyasin@redhat.com>

MANIFEST.in

@@ -1,5 +1,6 @@
 include LICENSE
 include AUTHORS
+include README.adoc
 include ChangeLog
 include requirements.txt
 include tendrl-noded.service

tendrl-node-agent.spec

@@ -68,7 +68,7 @@ py.test -v tendrl/node_agent/tests || :
 %dir %{_var}/log/tendrl/node_agent
 %dir %{_sysconfdir}/tendrl/node_agent
 %dir %{_datadir}/tendrl/node_agent
-%doc README.rst
+%doc README.adoc
 %license LICENSE
 %{_datadir}/tendrl/node_agent/
 %{_sysconfdir}/tendrl/tendrl.conf