Rename edgetpu-api -> python3-edgetpu

Change-Id: I44bcf627c20956ff64aaeeafd58dc1e60b377d3f
diff --git a/rootfs.mk b/rootfs.mk
index d23c08b..dfe3fb4 100644
--- a/rootfs.mk
+++ b/rootfs.mk
@@ -16,8 +16,8 @@
 	aiy-board-tools \
 	imx-board-audio \
 	imx-board-wlan \
-	edgetpu-api \
 	linux-image-4.9.51-aiy \
+	python3-edgetpu \
 	uboot-imx
 
 BSP_GUI_PACKAGES := \