Move assembler out of runtime into compiler/utils.

Other directory layout bits of clean up. There is still work to separate quick
and portable in some files (e.g. argument visitor, proxy..).

Change-Id: If8fecffda8ba5c4c47a035f0c622c538c6b58351
diff --git a/runtime/thread.h b/runtime/thread.h
index b9393a3..d02ab36 100644
--- a/runtime/thread.h
+++ b/runtime/thread.h
@@ -28,7 +28,7 @@
 #include "base/macros.h"
 #include "globals.h"
 #include "jvalue.h"
-#include "oat/runtime/oat_support_entrypoints.h"
+#include "entrypoints/quick/quick_entrypoints.h"
 #include "locks.h"
 #include "offsets.h"
 #include "root_visitor.h"
@@ -775,7 +775,7 @@
  public:
   // Runtime support function pointers
   // TODO: move this near the top, since changing its offset requires all oats to be recompiled!
-  EntryPoints entrypoints_;
+  QuickEntryPoints entrypoints_;
 
  private:
   // How many times has our pthread key's destructor been called?