doc: init next release notes

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
Acked-by: John McNamara <john.mcnamara@intel.com>

doc/guides/rel_notes/index.rst

@@ -40,6 +40,7 @@ Contents
     :numbered:
 
     rel_description
+    release_2_2
     release_2_1
     release_2_0
     release_1_8

doc/guides/rel_notes/release_2_2.rst

@@ -0,0 +1,58 @@
+DPDK Release 2.2
+================
+
+New Features
+------------
+
+
+Resolved Issues
+---------------
+
+
+Known Issues
+------------
+
+
+API Changes
+-----------
+
+
+ABI Changes
+-----------
+
+
+Shared Library Versions
+-----------------------
+
+The libraries prepended with a plus sign were incremented in this version.
+
+.. code-block:: diff
+
+     libethdev.so.1
+     librte_acl.so.1
+     librte_cfgfile.so.1
+     librte_cmdline.so.1
+     librte_distributor.so.1
+     librte_eal.so.1
+     librte_hash.so.1
+     librte_ip_frag.so.1
+     librte_ivshmem.so.1
+     librte_jobstats.so.1
+     librte_kni.so.1
+     librte_kvargs.so.1
+     librte_lpm.so.1
+     librte_malloc.so.1
+     librte_mbuf.so.1
+     librte_mempool.so.1
+     librte_meter.so.1
+     librte_pipeline.so.1
+     librte_pmd_bond.so.1
+     librte_pmd_ring.so.1
+     librte_port.so.1
+     librte_power.so.1
+     librte_reorder.so.1
+     librte_ring.so.1
+     librte_sched.so.1
+     librte_table.so.1
+     librte_timer.so.1
+     librte_vhost.so.1