init: handle properties and imports for host init verifier

Allow specifying properties on the command line when running host init
verifier.  This is needed particularly for importing files that have a
property expansion in their path.

Handle the import statement on host, basing paths off of the out
directory of Android builds.

Bug: 36970783
Test: verify that bullhead imports the correct files and checks them
Change-Id: I4fe263016b3764a372708b559bc0c739b1b7e5e3
diff --git a/init/Android.bp b/init/Android.bp
index 517847c..f579647 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -236,7 +236,8 @@
         "epoll.cpp",
         "keychords.cpp",
         "import_parser.cpp",
-        "host_init_parser.cpp",
+        "host_import_parser.cpp",
+        "host_init_verifier.cpp",
         "host_init_stubs.cpp",
         "parser.cpp",
         "rlimit_parser.cpp",