[llvm] [lldb] Add release note about ELF `thread siginfo` and negative SI Codes. (PR #141631)

[Jacob Lalonde via llvm-commits]

https://github.com/Jlalond updated https://github.com/llvm/llvm-project/pull/141631

>From bbb78eec61faf0e8e9d9dce6ff1c0a6df9f53f3b Mon Sep 17 00:00:00 2001
From: Jacob Lalonde <jalalonde at fb.com>
Date: Fri, 30 May 2025 09:10:53 -0700
Subject: [PATCH] Add release note about thread siginfo and new linux user
 space signal descriptions

---
 llvm/docs/ReleaseNotes.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/llvm/docs/ReleaseNotes.md b/llvm/docs/ReleaseNotes.md
index f1d1ce0ada227..7790f30c9f359 100644
--- a/llvm/docs/ReleaseNotes.md
+++ b/llvm/docs/ReleaseNotes.md
@@ -280,6 +280,12 @@ Changes to LLDB
   When using reverse execution, `process continue --forward` returns to the
   forward execution.
 * LLDB now supports RISC-V 32-bit ELF core files.
+* LLDB now supports siginfo descriptions for Linux user-space signals. User space
+  signals will now have descriptions describing the method and sender.
+  ```
+    stop reason = SIGSEGV: sent by tkill system call (sender pid=649752, uid=2667987)
+  ```
+* ELF Cores can now have their siginfo structures inspected using `thread siginfo`.
 
 ### Changes to lldb-dap