[gtk] gdk: Rename our vulkan context to GTK

[Matthias Clasen <matthiasc src gnome org>]

commit 77c0e68b57118baab6e4520cf9a77f37a20a7121
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Feb 24 10:53:23 2019 -0500

    gdk: Rename our vulkan context to GTK
    
    Not sure it shows up anywhere, but just for completeness.

 gdk/gdkvulkancontext.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gdk/gdkvulkancontext.c b/gdk/gdkvulkancontext.c
index 28a135ad06..6d5f72a3ce 100644
--- a/gdk/gdkvulkancontext.c
+++ b/gdk/gdkvulkancontext.c
@@ -1008,7 +1008,7 @@ gdk_display_create_vulkan_instance (GdkDisplay  *display,
                                                  .pNext = NULL,
                                                  .pApplicationName = g_get_application_name (),
                                                  .applicationVersion = 0,
-                                                 .pEngineName = "GTK+",
+                                                 .pEngineName = "GTK",
                                                  .engineVersion = VK_MAKE_VERSION (GDK_MAJOR_VERSION, 
GDK_MINOR_VERSION, GDK_MICRO_VERSION),
                                                  .apiVersion = VK_API_VERSION_1_0
                                              },