[gimp] libgimpbase: add gimp_installation_directory_file() to gimpbase.def

[Michael Natterer <mitch src gnome org>]

commit c71a887b08ea1eb00965ba514c5557a4d135a567
Author: Michael Natterer <mitch gimp org>
Date:   Sun Feb 3 14:50:48 2019 +0100

    libgimpbase: add gimp_installation_directory_file() to gimpbase.def

 libgimpbase/gimpbase.def | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/libgimpbase/gimpbase.def b/libgimpbase/gimpbase.def
index 2f6975e99f..f191669eb0 100644
--- a/libgimpbase/gimpbase.def
+++ b/libgimpbase/gimpbase.def
@@ -62,6 +62,7 @@ EXPORTS
        gimp_image_type_get_type
        gimp_ink_blob_type_get_type
        gimp_installation_directory
+       gimp_installation_directory_file
        gimp_interpolation_type_get_type
        gimp_join_style_get_type
        gimp_locale_directory