Move most of runtime/base to libartbase/base

Enforce the layering that code in runtime/base should not depend on
runtime by separating it into libartbase.  Some of the code in
runtime/base depends on the Runtime class, so it cannot be moved yet.
Also, some of the tests depend on CommonRuntimeTest, which itself needs
to be factored (in a subsequent CL).

Bug: 22322814
Test: make -j 50 checkbuild
      make -j 50 test-art-host

Change-Id: I8b096c1e2542f829eb456b4b057c71421b77d7e2
diff --git a/dex2oat/dex2oat_options.h b/dex2oat/dex2oat_options.h
index ccc85c8..cc124c1 100644
--- a/dex2oat/dex2oat_options.h
+++ b/dex2oat/dex2oat_options.h
@@ -21,6 +21,7 @@
 #include <string>
 #include <vector>
 
+#include "arch/instruction_set.h"
 #include "base/variant_map.h"
 #include "cmdline_types.h"  // TODO: don't need to include this file here
 #include "compiler.h"