add new animation classes to common includes.

utils/build/includes/common.json

@@ -34,6 +34,12 @@
 	"src/core/DirectGeometry.js",
 	"src/core/BufferGeometry.js",
 	"src/core/InstancedBufferGeometry.js",
+	"src/animation/AnimationAction.js",
+	"src/animation/AnimationClip.js",
+	"src/animation/AnimationMixer.js",
+	"src/animation/AnimationUtils.js",
+	"src/animation/KeyframeTrack.js",
+	"src/animation/PropertyBinding.js",
 	"src/cameras/Camera.js",
 	"src/cameras/CubeCamera.js",
 	"src/cameras/OrthographicCamera.js",