[gobject-introspection] Update glib annotations from git master

[Rico Tzschichholz <ricotz src gnome org>]

commit ca5bcd6132368e2067e8d8c32b3942d9704cacf7
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Sep 14 13:17:08 2015 +0200

    Update glib annotations from git master

 gir/glib-2.0.c    |   10 ++++++----
 gir/gobject-2.0.c |   17 ++++++++++++++---
 2 files changed, 20 insertions(+), 7 deletions(-)
---
diff --git a/gir/glib-2.0.c b/gir/glib-2.0.c
index 420ef23..0954815 100644
--- a/gir/glib-2.0.c
+++ b/gir/glib-2.0.c
@@ -27753,13 +27753,15 @@
  * @errnum: the system error number. See the standard C %errno
  *     documentation
  *
- * Returns a string corresponding to the given error code, e.g.
- * "no such process". You should use this function in preference to
- * strerror(), because it returns a string in UTF-8 encoding, and since
- * not all platforms support the strerror() function.
+ * Returns a string corresponding to the given error code, e.g. "no
+ * such process". Unlike strerror(), this always returns a string in
+ * UTF-8 encoding, and the pointer is guaranteed to remain valid for
+ * the lifetime of the process.
  *
  * Note that the string may be translated according to the current locale.
  *
+ * The value of %errno will not be changed by this function.
+ *
  * Returns: a UTF-8 string describing the error code. If the error code
  *     is unknown, it returns a string like "unknown error (<code>)".
  */
diff --git a/gir/gobject-2.0.c b/gir/gobject-2.0.c
index 217b81d..9302fa6 100644
--- a/gir/gobject-2.0.c
+++ b/gir/gobject-2.0.c
@@ -3534,11 +3534,11 @@
 
 /**
  * g_param_spec_get_default_value:
- * @param: a #GParamSpec
+ * @pspec: a #GParamSpec
  *
- * Gets the default value of @param as a pointer to a #GValue.
+ * Gets the default value of @pspec as a pointer to a #GValue.
  *
- * The #GValue will remain value for the life of @param.
+ * The #GValue will remain value for the life of @pspec.
  *
  * Returns: a pointer to a #GValue which must not be modified
  * Since: 2.38
@@ -3559,6 +3559,17 @@
 
 
 /**
+ * g_param_spec_get_name_quark:
+ * @param: a #GParamSpec
+ *
+ * Gets the GQuark for the name.
+ *
+ * Returns: the GQuark for @pspec->name.
+ * Since: 2.46
+ */
+
+
+/**
  * g_param_spec_get_nick:
  * @pspec: a valid #GParamSpec
  *