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/runtime/common_runtime_test.h b/runtime/common_runtime_test.h
index 85b0dbb..7fc70e2 100644
--- a/runtime/common_runtime_test.h
+++ b/runtime/common_runtime_test.h
@@ -26,13 +26,13 @@
 
 #include "arch/instruction_set.h"
 #include "base/mutex.h"
+#include "base/os.h"
 #include "base/unix_file/fd_file.h"
 #include "dex/art_dex_file_loader.h"
 #include "dex/compact_dex_level.h"
 #include "globals.h"
 // TODO: Add inl file and avoid including inl.
 #include "obj_ptr-inl.h"
-#include "os.h"
 #include "scoped_thread_state_change-inl.h"
 
 namespace art {