Add change log for #4514

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/ChangeLog.d/generated-files-cmake.txt b/ChangeLog.d/generated-files-cmake.txt
new file mode 100644
index 0000000..16841a5
--- /dev/null
+++ b/ChangeLog.d/generated-files-cmake.txt
@@ -0,0 +1,4 @@
+Changes
+    * The generated configuration-independent files are now automatically
+      generated by the CMake build system on Unix-like systems. This is not
+      yet supported when cross-compiling.