Header library to remove dependence on runtime/

Add a new header library to remove libdexfile and others' dependence on
runtime (typically runtime/base) includes in libdexfile.  Also a small step
to tease dexlayout and profman away from relying on these as well.

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

Change-Id: I38e2fe399a75f4bc6318c77a71954c00ea73ec2b
diff --git a/dex2oat/dex2oat.cc b/dex2oat/dex2oat.cc
index 1578656..926575e 100644
--- a/dex2oat/dex2oat.cc
+++ b/dex2oat/dex2oat.cc
@@ -44,6 +44,7 @@
 #include "base/callee_save_type.h"
 #include "base/dumpable.h"
 #include "base/file_utils.h"
+#include "base/leb128.h"
 #include "base/macros.h"
 #include "base/scoped_flock.h"
 #include "base/stl_util.h"
@@ -75,7 +76,6 @@
 #include "interpreter/unstarted_runtime.h"
 #include "java_vm_ext.h"
 #include "jit/profile_compilation_info.h"
-#include "leb128.h"
 #include "linker/buffered_output_stream.h"
 #include "linker/elf_writer.h"
 #include "linker/elf_writer_quick.h"