autotools/meson: compile against wayland-egl-*backend*

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106861
Fixes: 1db4ec05462914096b1f "egl: rewire the build systems to use libwayland-egl"
Suggested-by: Emil Velikov <emil.l.velikov@gmail.com>
Tested-by: Andreas Hartmetz <ahartmetz@gmail.com>
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
diff --git a/meson.build b/meson.build
index 636d0f9..160bbfa 100644
--- a/meson.build
+++ b/meson.build
@@ -1220,7 +1220,9 @@
   dep_wayland_client = dependency('wayland-client', version : '>=1.11')
   dep_wayland_server = dependency('wayland-server', version : '>=1.11')
   if with_egl
-    dep_wayland_egl = dependency('wayland-egl', version : '>=1.15')
+    dep_wayland_egl = dependency('wayland-egl-backend', version : '>= 3')
+    dep_wayland_egl_headers = declare_dependency(
+      compile_args : run_command(prog_pkgconfig, ['wayland-egl-backend', '--cflags']).stdout().split())
   endif
   wayland_dmabuf_xml = join_paths(
     dep_wl_protocols.get_pkgconfig_variable('pkgdatadir'), 'unstable',