[gtksourceview] vala.lang: Update to meet vala 0.38.0 specs

[Rico Tzschichholz <ricotz src gnome org>]

commit 3aacf305dfbcff32b2bf8045e1c6722f8285e80c
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sat Sep 9 15:35:41 2017 +0200

    vala.lang: Update to meet vala 0.38.0 specs
    
    https://bugzilla.gnome.org/show_bug.cgi?id=787472

 data/language-specs/vala.lang |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/data/language-specs/vala.lang b/data/language-specs/vala.lang
index a81a20c..da22dc5 100644
--- a/data/language-specs/vala.lang
+++ b/data/language-specs/vala.lang
@@ -281,6 +281,7 @@
       <keyword>uint64</keyword>
       <keyword>ulong</keyword>
       <keyword>unichar</keyword>
+      <keyword>unichar2</keyword>
       <keyword>ushort</keyword>
       <keyword>void</keyword>
     </context>
@@ -295,12 +296,21 @@
       Signal|
       Deprecated|
       Description|
+      Experimental|
+      Version|
       DBus|
       Compact|
+      ConcreteAccessor|
+      DestroysInstance|
       Diagnostics|
       ErrorBase|
       Flags|
+      FormatArg|
+      GenericAccessors|
       GIR|
+      GtkCallback|
+      GtkChild|
+      GtkTemplate|
       HasEmitter|
       Immutable|
       ModuleInit|