applypatch: Move to Soong.

Test: mmma bootable/recovery
Change-Id: Ie163aff1c4c2b3b15bb705825779ada6bc38ad67
diff --git a/Android.bp b/Android.bp
index 4c66c42..22407e0 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,4 +1,5 @@
 subdirs = [
+    "applypatch",
     "bootloader_message",
     "edify",
     "otafault",