render/gles2: log when creating renderer

Make it clear GLES2 is being used. Before this commit, various
GL-related information was printed, but not an easy-to-find line
about which renderer is being picked up.

render/gles2/renderer.c

@@ -768,6 +768,7 @@ struct wlr_renderer *wlr_gles2_renderer_create(struct wlr_egl *egl) {
 	renderer->exts_str = exts_str;
 	renderer->drm_fd = -1;
 
+	wlr_log(WLR_INFO, "Creating GLES2 renderer");
 	wlr_log(WLR_INFO, "Using %s", glGetString(GL_VERSION));
 	wlr_log(WLR_INFO, "GL vendor: %s", glGetString(GL_VENDOR));
 	wlr_log(WLR_INFO, "GL renderer: %s", glGetString(GL_RENDERER));