Add SPDX nubbins to EyeLights CircuitPython examples

EyeLights_Accelerometer_Tap/code.py

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2021 Phil Burgess for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 """
 ACCELEROMETER INPUT DEMO: while the LED Glasses Driver has a perfectly
 good clicky button for input, this code shows how one might instead use

EyeLights_Audio_Spectrum/code.py

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2021 Phil Burgess for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 """
 AUDIO SPECTRUM LIGHT SHOW for Adafruit EyeLights (LED Glasses + Driver).
 Uses onboard microphone and a lot of math to react to music.

EyeLights_Googly_Rings/code.py

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2021 Phil Burgess for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 """
 GOOGLY EYES for Adafruit EyeLight LED glasses + driver. Pendulum physics
 simulation using accelerometer and math. This uses only the rings, not the