[newlib-cygwin/cygwin-3_4-branch] Cygwin: document latest sys/cpuset.h fix

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=97a9684b99e54e3ede42f7d08564bc6d1bb42362

commit 97a9684b99e54e3ede42f7d08564bc6d1bb42362
Author:     Corinna Vinschen <corinna@vinschen.de>
AuthorDate: Fri Sep 1 12:41:43 2023 +0200
Commit:     Corinna Vinschen <corinna@vinschen.de>
CommitDate: Fri Sep 1 12:43:36 2023 +0200

    Cygwin: document latest sys/cpuset.h fix
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/release/3.4.9 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/winsup/cygwin/release/3.4.9 b/winsup/cygwin/release/3.4.9
index 53c4e5fc84ac..e2b0647464d3 100644
--- a/winsup/cygwin/release/3.4.9
+++ b/winsup/cygwin/release/3.4.9
@@ -11,3 +11,6 @@ Bug Fixes
 
 - Fix segfault when too many command line args are specified.
   Addresses: https://cygwin.com/pipermail/cygwin/2023-August/254333.html
+
+- Fix build problems in terms of sys/cpuset.h.
+  Addresses: https://cygwin.com/pipermail/cygwin/2023-August/254283.html