CHANGELOG: add watch exec command fix

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

CHANGELOG-3.3.md

@@ -3,6 +3,20 @@
 Previous change logs can be found at [CHANGELOG-3.2](https://github.com/coreos/etcd/blob/master/CHANGELOG-3.2.md).
 
 
+## [v3.3.5](https://github.com/coreos/etcd/releases/tag/v3.3.5) (TBD 2018-05)
+
+See [code changes](https://github.com/coreos/etcd/compare/v3.3.4...v3.3.5) and [v3.3 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md) for any breaking changes. **Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.3 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md).**
+
+### Fixed: v3 `etcdctl`
+
+- Fix [`watch [key] [range_end] -- [exec-command…]`](https://github.com/coreos/etcd/pull/9688) parsing.
+  - Previously,  `ETCDCTL_API=3 ./bin/etcdctl watch foo -- echo watch event received` panicked.
+
+### Go
+
+- Compile with [*Go 1.9.6*](https://golang.org/doc/devel/release.html#go1.9).
+
+
 ## [v3.3.4](https://github.com/coreos/etcd/releases/tag/v3.3.4) (2018-04-24)
 
 See [code changes](https://github.com/coreos/etcd/compare/v3.3.3...v3.3.4) and [v3.3 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md) for any breaking changes. **Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.3 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md).**

CHANGELOG-3.4.md

@@ -257,6 +257,11 @@ See [security doc](https://github.com/coreos/etcd/blob/master/Documentation/op-g
   - Again, etcd `Lease` is meant for short-periodic keepalives or sessions, in the range of seconds or minutes. Not for hours or days!
 - Enable etcd server [`raft.Config.CheckQuorum` when starting with `ForceNewCluster`](https://github.com/coreos/etcd/pull/9347).
 
+### Fixed: v3 `etcdctl`
+
+- Fix [`watch [key] [range_end] -- [exec-command…]`](https://github.com/coreos/etcd/pull/9688) parsing.
+  - Previously,  `ETCDCTL_API=3 ./bin/etcdctl watch foo -- echo watch event received` panicked.
+
 ### Tooling
 
 - Add [`etcd-dump-logs --entry-type`](https://github.com/coreos/etcd/pull/9628) flag to support WAL log filtering by entry type.