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/gc/allocator/dlmalloc.cc b/runtime/gc/allocator/dlmalloc.cc
index 4570e9c..e508d5f 100644
--- a/runtime/gc/allocator/dlmalloc.cc
+++ b/runtime/gc/allocator/dlmalloc.cc
@@ -59,8 +59,8 @@
 
 #include <sys/mman.h>
 
-#include "globals.h"
-#include "utils.h"
+#include "base/globals.h"
+#include "base/utils.h"
 
 extern "C" void DlmallocMadviseCallback(void* start, void* end, size_t used_bytes, void* arg) {
   // Is this chunk in use?