[gtk+] meson: install gdkdrawcontext.h

[Emmanuele Bassi <ebassi src gnome org>]

commit c9caa6167ef87dc8d755396c31a85552d9fc063e
Author: Marc-Antoine Perennou <Marc-Antoine Perennou com>
Date:   Wed May 24 10:09:35 2017 +0200

    meson: install gdkdrawcontext.h
    
    https://bugzilla.gnome.org/show_bug.cgi?id=782981
    
    Signed-off-by: Marc-Antoine Perennou <Marc-Antoine Perennou com>

 gdk/meson.build |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gdk/meson.build b/gdk/meson.build
index 0197538..d81f885 100644
--- a/gdk/meson.build
+++ b/gdk/meson.build
@@ -51,6 +51,7 @@ gdk_public_headers = files([
   'gdkdisplay.h',
   'gdkdisplaymanager.h',
   'gdkdnd.h',
+  'gdkdrawcontext.h',
   'gdkdrawingcontext.h',
   'gdkevents.h',
   'gdkframeclock.h',