[gtk-doc] build files: add an exeption clause to make use easier

[Stefan Sauer <stefkost src gnome org>]

commit d9544728bf823f20c7e724fc764e79a6bc92e13e
Author: Stefan Sauer <ensonic users sf net>
Date:   Wed Nov 1 21:23:48 2017 +0100

    build files: add an exeption clause to make use easier
    
    Add an exception clause to the files that are likely to be modified.
    
    See https://bugzilla.gnome.org/show_bug.cgi?id=788991

 examples/Makefile.am |    8 ++++++++
 gtk-doc.m4           |   45 ++++++++++++++++++++++++++-------------------
 2 files changed, 34 insertions(+), 19 deletions(-)
---
diff --git a/examples/Makefile.am b/examples/Makefile.am
index 17c88a3..def04cf 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -15,6 +15,14 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# As a special exception, the above copyright owner gives unlimited
+# permission to copy, distribute and modify this Makefile.am template.
+# You need not follow the terms of the GNU General Public License when
+# using or distributing such Makefile.am files, even though portions of
+# the text of the Makefile.am appear in them. The GNU General Public
+# License (GPL) does govern all other use of the material that constitutes
+# the Makefile.am template.
 
 # This is a blank Makefile.am for using gtk-doc.
 # Copy this to your project's API docs directory and modify the variables to
diff --git a/gtk-doc.m4 b/gtk-doc.m4
index ace6e8e..2d12f01 100644
--- a/gtk-doc.m4
+++ b/gtk-doc.m4
@@ -1,22 +1,29 @@
-dnl -*- mode: autoconf -*-
-dnl
-dnl gtk-doc.m4 - configure macro to check for gtk-doc
-dnl Copyright (C) 2003 James Henstridge
-dnl               2007-2017  Stefan Sauer
-dnl
-dnl This program is free software: you can redistribute it and/or modify
-dnl it under the terms of the GNU General Public License as published by
-dnl the Free Software Foundation, either version 3 of the License, or
-dnl (at your option) any later version.
-dnl
-dnl This program is distributed in the hope that it will be useful,
-dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
-dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-dnl GNU General Public License for more details.
-dnl
-dnl You should have received a copy of the GNU General Public License
-dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
+# -*- mode: autoconf -*-
+#
+# gtk-doc.m4 - configure macro to check for gtk-doc
+# Copyright (C) 2003 James Henstridge
+#               2007-2017  Stefan Sauer
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# As a special exception, the above copyright owner gives unlimited
+# permission to copy, distribute and modify the configure scripts that
+# are the output of Autoconf when processing the Macro. You need not
+# follow the terms of the GNU General Public License when using or
+# distributing such scripts, even though portions of the text of the
+# Macro appear in them. The GNU General Public License (GPL) does govern
+# all other use of the material that constitutes the Autoconf Macro.
 
 # serial 2