Fix license header of two files.

Reported by Herbert Oppmann <herbert.oppmann@siemens.com>.

* woe32dll/export.h: Use an LGPL 2 license header.
* woe32dll/iconv-exports.c: Likewise.
diff --git a/woe32dll/export.h b/woe32dll/export.h
index 0ef05cc..7321c49 100644
--- a/woe32dll/export.h
+++ b/woe32dll/export.h
@@ -2,18 +2,19 @@
    Copyright (C) 2006, 2011-2018 Free Software Foundation, Inc.
    Written by Bruno Haible <bruno@clisp.org>, 2006.
 
-   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 free software; you can redistribute it and/or modify
+   it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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.
+   GNU Library 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 <https://www.gnu.org/licenses/>.  */
+   You should have received a copy of the GNU Library General Public
+   License along with this program; see the file COPYING.LIB.  If not,
+   see <https://www.gnu.org/licenses/>.  */
 
 /* There are four ways to build shared libraries on Cygwin:
 
diff --git a/woe32dll/iconv-exports.c b/woe32dll/iconv-exports.c
index 48b2d2a..7b9b60a 100644
--- a/woe32dll/iconv-exports.c
+++ b/woe32dll/iconv-exports.c
@@ -2,18 +2,19 @@
    Copyright (C) 2006 Free Software Foundation, Inc.
    Written by Bruno Haible <bruno@clisp.org>, 2006.
 
-   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 free software; you can redistribute it and/or modify
+   it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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.
+   GNU Library 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 <https://www.gnu.org/licenses/>.  */
+   You should have received a copy of the GNU Library General Public
+   License along with this program; see the file COPYING.LIB.  If not,
+   see <https://www.gnu.org/licenses/>.  */
 
 #include "woe32dll/export.h"