[newlib-cygwin] Document previous unlink patch

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=f21c9bface547a444027ecb7e29c57631ab296aa

commit f21c9bface547a444027ecb7e29c57631ab296aa
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Thu Apr 23 15:22:37 2015 +0200

    Document previous unlink patch
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/release/2.0.0 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/winsup/cygwin/release/2.0.0 b/winsup/cygwin/release/2.0.0
index 6c89819..08d4450 100644
--- a/winsup/cygwin/release/2.0.0
+++ b/winsup/cygwin/release/2.0.0
@@ -43,3 +43,9 @@ Bug Fixes
 
 - Fix shmget usage of size parameter for already existing segments.
   Addresses: https://cygwin.com/ml/cygwin/2015-04/msg00105.html
+
+- Fix how in-use files on virtual drives created via subst are moved to
+  the recycler in unlink(2).
+  Addresses: https://cygwin.com/ml/cygwin/2015-04/msg00527.html
+
+- Fix how in-use files on Samba drives are renamed in unlink(2).