init: Move keychords to keychords.c

Change-Id: I8fba9f5f73439a451fc961f8111612dff4fb5dfd
diff --git a/init/Android.mk b/init/Android.mk
index d3766d4..e107bbb 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -10,7 +10,8 @@
 	property_service.c \
 	util.c \
 	parser.c \
-	logo.c
+	logo.c \
+	keychords.c
 
 ifeq ($(strip $(INIT_BOOTCHART)),true)
 LOCAL_SRC_FILES += bootchart.c