Add changelog

Signed-off-by: Felix Conway <felix.conway@arm.com>
diff --git a/ChangeLog.d/unterminated-string-initialization.txt b/ChangeLog.d/unterminated-string-initialization.txt
new file mode 100644
index 0000000..75a72ca
--- /dev/null
+++ b/ChangeLog.d/unterminated-string-initialization.txt
@@ -0,0 +1,3 @@
+Bugfix
+   * Silence spurious -Wunterminated-string-initialization warnings introduced
+     by GCC 15. Fixes #9944.