trusty*: Android.mk -> Android.bp

Test: links
Bug: 37512442
Change-Id: I86bcdcfffbbd81dedb921612bd2d21ea4aabaeb1
diff --git a/trusty/Android.bp b/trusty/Android.bp
index 9681488..386fbe6 100644
--- a/trusty/Android.bp
+++ b/trusty/Android.bp
@@ -1,4 +1,7 @@
 subdirs = [
+    "gatekeeper",
+    "keymaster",
     "libtrusty",
+    "nvram",
     "storage/*",
 ]