WiringPi: Android: Add odroidhc4.c to compile on the android platform.

Change-Id: I36451f7c5c2ca99506e666f49a3d04a3f981310a
diff --git a/Android.bp b/Android.bp
index 41e8464..9e51b94 100644
--- a/Android.bp
+++ b/Android.bp
@@ -25,6 +25,7 @@
         "wiringPi/mcp23017.c",
         "wiringPi/odroidc2.c",
         "wiringPi/odroidc4.c",
+        "wiringPi/odroidhc4.c",
         "wiringPi/drcSerial.c",
         "wiringPi/mcp23s08.c",
         "wiringPi/odroidn1.c",