python3: bundle libffi for GNU/Linux builds

CPython commit f40d4ddff3c800b3c956a5e8820aabe3aa87cddd "Closes #27979:
Remove bundled copy of libffi" causes a bit of a problem because it
turns out that libffi isn't all that stable; there's libffi.so.5 on
CentOS 6, libffi.so.6 on CentOS 7 and libffi.so.7 on
lo_daily_update_gandalf tinderbox.

So we have to bundle it in LO; it's only used on GNU/Linux currently.

CPython commit 32119e10b792ad7ee4e5f951a2d89ddbaf111cc5 "bpo-35947:
Update Windows to the current version of libffi (GH-11797)" also removes
the libffi for MSVC, so in a future python upgrade we will have to build
libffi for MSVC too.

The libffi fork for MacOSX is still in CPython git master.

(regression from b10be5d48433076f0b7238d818020f708553e114)

Change-Id: Ibc20cf8cd3614cf9941b6970662bd930496776b2
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/86493
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@cib.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/readlicense_oo/license/license.xml b/readlicense_oo/license/license.xml
index 265dd98d2f3a..3bf0c1252484 100644
--- a/readlicense_oo/license/license.xml
+++ b/readlicense_oo/license/license.xml
@@ -1686,6 +1686,29 @@
         ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,
         UPDATES, ENHANCEMENTS, OR MODIFICATIONS.</p>
     </div>
+    <div class ="LIBFFI">
+        <h2>libffi</h2>
+        <p>The following software may be included in this product: libffi</p>
+        <p>The libffi project code is covered by the MIT license:</p>
+        <p>libffi - Copyright (c) 1996-2019  Anthony Green, Red Hat, Inc and others.</p>
+        <p>See source files for details.</p>
+        <p>Permission is hereby granted, free of charge, to any person obtaining
+        a copy of this software and associated documentation files (the
+        ``Software''), to deal in the Software without restriction, including
+        without limitation the rights to use, copy, modify, merge, publish,
+        distribute, sublicense, and/or sell copies of the Software, and to
+        permit persons to whom the Software is furnished to do so, subject to
+        the following conditions:</p>
+        <p>The above copyright notice and this permission notice shall be
+        included in all copies or substantial portions of the Software.</p>
+        <p>THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
+        EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+        MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+        IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+        CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+        TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+        SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</p>
+    </div>
     <div class="PYTHON">
         <h2>Python</h2>
         <p>The following software may be included in this product: Python. Use of any of this software is governed by