[vala/0.40] glib-2.0: add MappedFile.from_fd constructor

[Rico Tzschichholz <ricotz src gnome org>]

commit 2b4b1cc5c09c5fd899e1ad4928aa06be226d90fb
Author: Christian Kellner <christian kellner me>
Date:   Tue Jul 16 18:16:52 2019 +0200

    glib-2.0: add MappedFile.from_fd constructor
    
    Add the missing 'g_mapped_file_new_from_fd' constructor, added
    with glib 2.32.
    
    Fixes https://gitlab.gnome.org/GNOME/vala/issues/824

 vapi/glib-2.0.vapi | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index 6964cd9b4..eb725ffd9 100644
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -3742,6 +3742,8 @@ namespace GLib {
        [CCode (ref_function = "g_mapped_file_ref", unref_function = "g_mapped_file_unref")]
        public class MappedFile {
                public MappedFile (string filename, bool writable) throws FileError;
+               [Version (since = "2.32")]
+               public MappedFile.from_fd (int fd, bool writable) throws FileError;
                public size_t get_length ();
                public unowned char* get_contents ();
                [Version (since = "2.34")]