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/imgdiag/imgdiag.cc b/imgdiag/imgdiag.cc
index 5d9e361..9ac51f1 100644
--- a/imgdiag/imgdiag.cc
+++ b/imgdiag/imgdiag.cc
@@ -20,31 +20,31 @@
 #include <fstream>
 #include <functional>
 #include <iostream>
-#include <string>
-#include <vector>
-#include <set>
 #include <map>
+#include <set>
+#include <string>
 #include <unordered_set>
+#include <vector>
 
 #include "android-base/stringprintf.h"
 
 #include "art_field-inl.h"
 #include "art_method-inl.h"
 #include "base/unix_file/fd_file.h"
-#include "gc/space/image_space.h"
 #include "gc/heap.h"
+#include "gc/space/image_space.h"
+#include "image.h"
 #include "mirror/class-inl.h"
 #include "mirror/object-inl.h"
-#include "image.h"
-#include "scoped_thread_state_change-inl.h"
 #include "os.h"
+#include "scoped_thread_state_change-inl.h"
 
-#include "cmdline.h"
 #include "backtrace/BacktraceMap.h"
+#include "cmdline.h"
 
+#include <signal.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <signal.h>
 
 namespace art {