Simplify aos::Init

Most of the variants were to deal with core, which has been gone for a
year.  Simplify those all into InitGoogle.

InitGoogle should be renamed to Init at some point.  It does everything
now.

Change-Id: I738ee03e9c5b2e6348ef33302835f915df68011f
diff --git a/y2017/vision/target_receiver.cc b/y2017/vision/target_receiver.cc
index e96fba9..84d3428 100644
--- a/y2017/vision/target_receiver.cc
+++ b/y2017/vision/target_receiver.cc
@@ -72,7 +72,7 @@
 }  // namespace vision
 }  // namespace y2017
 
-int main(int /*argc*/, char ** /*argv*/) {
-  ::aos::InitNRT();
+int main(int argc, char **argv) {
+  ::aos::InitGoogle(&argc, &argv);
   ::y2017::vision::Main();
 }