Create libufdt_verify

Exposes an API to verify if a device tree overlay has been correctly
applied on an FDT.

Bug: 67779848
Test: vts-tradefed run vts -m VtsVerifyDTBOTest
Change-Id: I0606fd79784b8beed1d912129dfbc9b7634e7708
diff --git a/Android.bp b/Android.bp
index 3800a5a..76d69e5 100644
--- a/Android.bp
+++ b/Android.bp
@@ -14,6 +14,7 @@
 
 subdirs = [
     "sysdeps",
+    "tests/libufdt_verify",
 ]
 
 cc_library_static {
@@ -33,4 +34,3 @@
         "libufdt_sysdeps",
     ],
 }
-