[newlib-cygwin] cygwin: document env var crash fix

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=163066a1a5fec04b3b05d44955fe1b07c0391f1c

commit 163066a1a5fec04b3b05d44955fe1b07c0391f1c
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Tue Jun 6 21:11:52 2017 +0200

    cygwin: document env var crash fix
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/release/2.8.1 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/winsup/cygwin/release/2.8.1 b/winsup/cygwin/release/2.8.1
index 9a0ecb7..aa486d0 100644
--- a/winsup/cygwin/release/2.8.1
+++ b/winsup/cygwin/release/2.8.1
@@ -30,3 +30,6 @@ Bug Fixes
 
 - Fix buffer overflow problem in wcsxfrm/wcsxfrm_l.
   Addresses: https://cygwin.com/ml/cygwin/2017-05/msg00149.html
+
+- Fix crash if env var name starts with non-ASCII char
+  Addresses: https://cygwin.com/ml/cygwin/2017-05/msg00330.html