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/oat_file.cc b/runtime/oat_file.cc
index 1c1189d..4033f8c 100644
--- a/runtime/oat_file.cc
+++ b/runtime/oat_file.cc
@@ -17,15 +17,15 @@
 #include "oat_file.h"
 
 #include <dlfcn.h>
-#include <string.h>
-#include <type_traits>
-#include <unistd.h>
-
-#include <cstdlib>
 #ifndef __APPLE__
 #include <link.h>  // for dl_iterate_phdr.
 #endif
+#include <unistd.h>
+
+#include <cstdlib>
+#include <cstring>
 #include <sstream>
+#include <type_traits>
 
 // dlopen_ext support from bionic.
 #ifdef ART_TARGET_ANDROID
@@ -44,10 +44,10 @@
 #include "elf_file.h"
 #include "elf_utils.h"
 #include "gc_root.h"
-#include "oat.h"
 #include "mem_map.h"
 #include "mirror/class.h"
 #include "mirror/object-inl.h"
+#include "oat.h"
 #include "oat_file-inl.h"
 #include "oat_file_manager.h"
 #include "os.h"