Revert "Revert "Initial implementation of bpfix""

Bug: 38351765
Test: bpfix Android.bp

This reverts commit a8cc9c53fa5eb7004bc07c5c0ca8613761afd49b.

Change-Id: I60f02a8dd920346aa17b9044f834ffe94fa693c6
diff --git a/Android.bp b/Android.bp
index a029265..c571e74 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,5 +1,6 @@
 subdirs = [
     "androidmk",
+    "bpfix",
     "cmd/*",
     "third_party/zip",
     "ui/*",