[rpms/libunwind] epel9: Migrate to SPDX license

            A new commit has been pushed.

            Repo   : rpms/libunwind
            Branch : epel9
            Commit : bc33082ca5cfec5b0af33a361ac0e2255908c687
            Author : Miroslav Suchý <msuchy@redhat.com>
            Date   : 2023-10-31T06:33:23+00:00
            Stats  : +1/-1 in 1 file(s)
            URL    : https://src.fedoraproject.org/rpms/libunwind/c/bc33082ca5cfec5b0af33a361ac0e2255908c687?branch=epel9

            Log:
            Migrate to SPDX license

This is a mess. There is no sign of BSD - as far as source git allowed me to go. The frontpage at Savanah claims that the license is X11. But the license file and file headers refer to plain MIT.
This is part of https://fedoraproject.org/wiki/Changes/SPDX_Licenses_Phase_2

---
diff --git a/libunwind.spec b/libunwind.spec
index 3a0bb1c..c055a11 100644
--- a/libunwind.spec
+++ b/libunwind.spec
@@ -47,7 +47,7 @@ Summary: An unwinding library
 Name: libunwind
 Version: 1.7.2
 Release: 1%{?dist}
-License: BSD
+License: MIT
 URL: http://savannah.nongnu.org/projects/libunwind
 Source: https://github.com/libunwind/libunwind/releases/download/v%{version}/%{name}-%{version}.tar.gz