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/compiler/exception_test.cc b/compiler/exception_test.cc
index f00fe63..f582341 100644
--- a/compiler/exception_test.cc
+++ b/compiler/exception_test.cc
@@ -19,6 +19,7 @@
 #include "base/arena_allocator.h"
 #include "base/callee_save_type.h"
 #include "base/enums.h"
+#include "base/leb128.h"
 #include "class_linker.h"
 #include "common_runtime_test.h"
 #include "dex/code_item_accessors-inl.h"
@@ -27,7 +28,6 @@
 #include "dex/dex_file_exception_helpers.h"
 #include "gtest/gtest.h"
 #include "handle_scope-inl.h"
-#include "leb128.h"
 #include "mirror/class-inl.h"
 #include "mirror/object-inl.h"
 #include "mirror/object_array-inl.h"