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/read_barrier.h b/runtime/read_barrier.h
index ca77685..d36acbc 100644
--- a/runtime/read_barrier.h
+++ b/runtime/read_barrier.h
@@ -18,8 +18,8 @@
 #define ART_RUNTIME_READ_BARRIER_H_
 
 #include "base/logging.h"
-#include "base/mutex.h"
 #include "base/macros.h"
+#include "base/mutex.h"
 #include "gc_root.h"
 #include "jni.h"
 #include "mirror/object_reference.h"