shell: Rename GLSLQuad to GLSLEffect

You can guess where this is going ...

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/651

src/meson.build

@@ -86,7 +86,7 @@ libshell_public_headers = [
   'shell-app-system.h',
   'shell-app-usage.h',
   'shell-embedded-window.h',
-  'shell-glsl-quad.h',
+  'shell-glsl-effect.h',
   'shell-gtk-embed.h',
   'shell-global.h',
   'shell-invert-lightness-effect.h',
@@ -122,7 +122,7 @@ libshell_sources = [
   'shell-embedded-window.c',
   'shell-embedded-window-private.h',
   'shell-global.c',
-  'shell-glsl-quad.c',
+  'shell-glsl-effect.c',
   'shell-gtk-embed.c',
   'shell-invert-lightness-effect.c',
   'shell-keyring-prompt.c',

src/shell-glsl-effect.c

@@ -14,7 +14,7 @@
 #include "config.h"
 
 #include <cogl/cogl.h>
-#include "shell-glsl-quad.h"
+#include "shell-glsl-effect.h"
 
 typedef struct _ShellGLSLQuadPrivate ShellGLSLQuadPrivate;
 struct _ShellGLSLQuadPrivate