Cygwin: Add 3.0.2 release file

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/release/3.0.2

@@ -0,0 +1,20 @@
+What's new:
+-----------
+
+
+What changed:
+-------------
+
+
+Bug Fixes
+---------
+
+- Fix timerfd select always returning immediately.
+  Addresses: https://cygwin.com/ml/cygwin/2019-02/msg00364.html
+
+- Drop enforcing case-correct group names for AD accounts to avoid
+  excessively long startup times.
+  Addresses: https://cygwin.com/ml/cygwin/2019-02/msg00301.html
+
+- Fix and speed up evaluation of group membership in seteuid.
+  Addresses: Local testing.