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/compiler/jni/quick/calling_convention.h b/compiler/jni/quick/calling_convention.h
index d492b42..f2b7fd9 100644
--- a/compiler/jni/quick/calling_convention.h
+++ b/compiler/jni/quick/calling_convention.h
@@ -18,9 +18,9 @@
 #define ART_COMPILER_JNI_QUICK_CALLING_CONVENTION_H_
 
 #include <vector>
-#include "oat/utils/managed_register.h"
 #include "stack_indirect_reference_table.h"
 #include "thread.h"
+#include "utils/managed_register.h"
 
 namespace art {