Make EventInterfaces.in build step not depend on bindings generation

Source/modules/modules.gypi

Index: Source/modules/modules.gypi
diff --git a/Source/modules/modules.gypi b/Source/modules/modules.gypi
index b3b481867c6a45290e481e73758d523672bc935c..a0ca69713e7add09051e4b2a9977a2f16a5b08ba 100644
--- a/Source/modules/modules.gypi
+++ b/Source/modules/modules.gypi
@@ -224,6 +224,30 @@
       'webdatabase/WorkerGlobalScopeWebDatabase.idl',
       'webmidi/NavigatorWebMIDI.idl',
     ],
+    'modules_event_idl_files': [
+      'device_orientation/DeviceMotionEvent.idl',
+      'device_orientation/DeviceOrientationEvent.idl',
+      'encryptedmedia/MediaKeyMessageEvent.idl',
+      'encryptedmedia/MediaKeyNeededEvent.idl',
+      'gamepad/GamepadEvent.idl',
+      'indexeddb/IDBVersionChangeEvent.idl',
+      'mediastream/MediaStreamEvent.idl',
+      'mediastream/MediaStreamTrackEvent.idl',
+      'mediastream/RTCDTMFToneChangeEvent.idl',
+      'mediastream/RTCDataChannelEvent.idl',
+      'mediastream/RTCIceCandidateEvent.idl',
+      'serviceworkers/FetchEvent.idl',
+      'serviceworkers/InstallEvent.idl',
+      'serviceworkers/InstallPhaseEvent.idl',
+      'speech/SpeechRecognitionError.idl',
+      'speech/SpeechRecognitionEvent.idl',
+      'speech/SpeechSynthesisEvent.idl',
+      'webaudio/AudioProcessingEvent.idl',
+      'webaudio/OfflineAudioCompletionEvent.idl',
+      'webmidi/MIDIConnectionEvent.idl',
+      'webmidi/MIDIMessageEvent.idl',
+      'websockets/CloseEvent.idl',
+    ],
     'modules_files': [
       '<@(extra_blink_module_files)',
       'battery/BatteryManager.cpp',