[libglnx] fdio: Add gtk-doc for stbuf parameter of glnx_file_copy_at()

[Colin Walters <walters src gnome org>]

commit b59bb2be7cf092f82932c8671d24ef1362aac364
Author: Colin Walters <walters verbum org>
Date:   Tue Sep 12 11:09:11 2017 -0400

    fdio: Add gtk-doc for stbuf parameter of glnx_file_copy_at()
    
    Spotted in https://github.com/GNOME/libglnx/pull/80/commits/ba5e1cf9f58770ba879e9fb6ac337ccec9d0a10c

 glnx-fdio.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/glnx-fdio.c b/glnx-fdio.c
index 8093836..a257c05 100644
--- a/glnx-fdio.c
+++ b/glnx-fdio.c
@@ -866,6 +866,7 @@ glnx_regfile_copy_bytes (int fdf, int fdt, off_t max_bytes)
  * glnx_file_copy_at:
  * @src_dfd: Source directory fd
  * @src_subpath: Subpath relative to @src_dfd
+ * @src_stbuf: (allow-none): Optional stat buffer for source; if a stat() has already been done
  * @dest_dfd: Target directory fd
  * @dest_subpath: Destination name
  * @copyflags: Flags