[vala/0.40] posix: Add freopen binding, as FILE.reopen()

[Rico Tzschichholz <ricotz src gnome org>]

commit ebb06996c223a4aedcac313eb67f4822662a9633
Author: Reuben Thomas <rrt sc3d org>
Date:   Mon Nov 2 22:04:56 2020 +0000

    posix: Add freopen binding, as FILE.reopen()

 vapi/posix.vapi | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/vapi/posix.vapi b/vapi/posix.vapi
index 4845328d6..07bc8f996 100644
--- a/vapi/posix.vapi
+++ b/vapi/posix.vapi
@@ -2850,6 +2850,9 @@ namespace Posix {
 
                [CCode (cname = "fopen")]
                public static FILE? open (string path, string mode);
+               [CCode (cname = "freopen", instance_pos = -1)]
+               [ReturnsModifiedPointer]
+               public void reopen (string filename, string mode);
                [CCode (cname = "fdopen")]
                public static FILE? fdopen (int fildes, string mode);
                [CCode (cname = "popen")]