Update makefiles.

Note cleanspec required because of b/38205169 (genrule
doesn't delete output files before building, so when
removing some, they get stale).

Test: power vts test compiles
Change-Id: Ie7ef0fc3d943a75fe898238cf861fb7f99f4146b
Fixes: 35813011
diff --git a/power/Android.bp b/power/Android.bp
index 8cb3ea3..7a315fa 100644
--- a/power/Android.bp
+++ b/power/Android.bp
@@ -2,6 +2,7 @@
 subdirs = [
     "1.0",
     "1.0/default",
+    "1.0/vts/functional",
     "1.1",
     "1.1/default",
     "1.1/vts/functional",