[glib] gstdio: #include fcntl.h on UNIX in gstdio.h

[Philip Withnall <pwithnall src gnome org>]

commit 6f8073d44ab02e9d641ccbe8c2640796ca1456ca
Author: Reuben Thomas <rrt sc3d org>
Date:   Tue Sep 12 10:49:43 2017 +0100

    gstdio: #include fcntl.h on UNIX in gstdio.h
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781598

 glib/gstdio.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/glib/gstdio.h b/glib/gstdio.h
index 15091b3..6b03b01 100644
--- a/glib/gstdio.h
+++ b/glib/gstdio.h
@@ -22,6 +22,9 @@
 #include <glib/gprintf.h>
 
 #include <sys/stat.h>
+#ifdef G_OS_UNIX
+#include <fcntl.h>
+#endif
 
 G_BEGIN_DECLS