Runs host_init_verifier on merged target files packages.

This verifies the init rc files in the merged result.

Bug: 163089173
Test: test_common.py
Test: Run merge_target_files.py to merge two target-files packages where
      one has init_rc errors. Observe script failure.
Test: Run merge_target_files.py on two good target-files packages,
      observe no failure.
Change-Id: I86c8e5a2bc07c2c1896ac40afd32bc1d055447ee
diff --git a/tools/releasetools/Android.bp b/tools/releasetools/Android.bp
index 11fb584..cafc2bb 100644
--- a/tools/releasetools/Android.bp
+++ b/tools/releasetools/Android.bp
@@ -435,6 +435,7 @@
     ],
     required: [
         "checkvintf",
+        "host_init_verifier",
     ],
     target: {
         darwin: {