Use correct include path for glapi.h

backend/drm/renderer.c

@@ -14,7 +14,7 @@
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include "backend/drm/drm.h"
-#include "render/glapi.h"
+#include "glapi.h"
 
 bool wlr_drm_renderer_init(struct wlr_drm_backend *drm,
 		struct wlr_drm_renderer *renderer) {

render/egl.c

@@ -4,7 +4,7 @@
 #include <stdlib.h>
 #include <wlr/util/log.h>
 #include <wlr/render/egl.h>
-#include "render/glapi.h"
+#include "glapi.h"
 
 // Extension documentation
 // https://www.khronos.org/registry/EGL/extensions/KHR/EGL_KHR_image_base.txt.

render/gles2/renderer.c

@@ -12,7 +12,7 @@
 #include <wlr/render/matrix.h>
 #include <wlr/util/log.h>
 #include "render/gles2.h"
-#include "render/glapi.h"
+#include "glapi.h"
 
 struct shaders shaders;