[gobject-introspection] gir: Update annotations from GLib git master

[Rico Tzschichholz <ricotz src gnome org>]

commit fa780a852403ea0d02e03a83d069e177d022e1a7
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Sep 12 21:03:42 2016 +0200

    gir: Update annotations from GLib git master

 gir/gio-2.0.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gir/gio-2.0.c b/gir/gio-2.0.c
index c4eedd0..cec75a1 100644
--- a/gir/gio-2.0.c
+++ b/gir/gio-2.0.c
@@ -37771,7 +37771,7 @@
 /**
  * g_subprocess_launcher_set_environ:
  * @self: a #GSubprocess
- * @env: the replacement environment
+ * @env: (array zero-terminated=1): the replacement environment
  *
  * Replace the entire environment of processes launched from this
  * launcher with the given 'environ' variable.