[libxslt] Set working directory for Python generator

[Nick Wellnhofer <nwellnhof src gnome org>]

commit a59b1d823cb76ad70e56feaed77b3a7f28350734
Author: Markus Rickert <rickert fortiss org>
Date:   Thu Jun 4 21:09:57 2020 +0200

    Set working directory for Python generator

 CMakeLists.txt | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7599c0ae..fabc669f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -397,6 +397,8 @@ if(LIBXSLT_WITH_PYTHON)
                ${CMAKE_CURRENT_SOURCE_DIR}/python/generator.py
                ${CMAKE_CURRENT_SOURCE_DIR}/doc/libxslt-api.xml
                ${CMAKE_CURRENT_SOURCE_DIR}/python/libxslt-python-api.xml
+               WORKING_DIRECTORY
+               ${CMAKE_CURRENT_BINARY_DIR}
        )
        unset(ENV{SRCDIR})
        file(READ python/libxsl.py LIBXSL_PY)