ART: Include cleanup

Let clang-format reorder the header includes.

Derived with:

* .clang-format:
 BasedOnStyle: Google
 IncludeIsMainRegex: '(_test|-inl)?$'

* Steps:
 find . -name '*.cc' -o -name '*.h' | xargs sed -i.bak -e 's/^#include/ #include/' ; git commit -a -m 'ART: Include cleanup'
 git-clang-format -style=file HEAD^
 manual inspection
 git commit -a --amend

Test: mmma art
Change-Id: Ia963a8ce3ce5f96b5e78acd587e26908c7a70d02
diff --git a/runtime/reference_table.cc b/runtime/reference_table.cc
index d8b9dcc..e6e588e 100644
--- a/runtime/reference_table.cc
+++ b/runtime/reference_table.cc
@@ -20,10 +20,10 @@
 
 #include "base/mutex.h"
 #include "indirect_reference_table.h"
-#include "mirror/array.h"
 #include "mirror/array-inl.h"
-#include "mirror/class.h"
+#include "mirror/array.h"
 #include "mirror/class-inl.h"
+#include "mirror/class.h"
 #include "mirror/object-inl.h"
 #include "mirror/string-inl.h"
 #include "runtime-inl.h"