tdf#130978 Add a comment to each published API

Added comment to TEMPLATE.SOURCECODE.HEADER to document published API header files

Change-Id: I28675d53a5aa7f0a01275273b3d95b2209f2ba0e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/109945
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
diff --git a/TEMPLATE.SOURCECODE.HEADER b/TEMPLATE.SOURCECODE.HEADER
index dd0f99a..1f03059 100644
--- a/TEMPLATE.SOURCECODE.HEADER
+++ b/TEMPLATE.SOURCECODE.HEADER
@@ -153,3 +153,18 @@ For XML / .component:
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
-->


------------------------------------------------------------------------

             For source headers which are part of
               LibreOffice published API:

------------------------------------------------------------------------

In published API header files:

/*
 * This file is part of LibreOffice project published API
 */
...