ART: Clean up includes.

Reduce dependencies to improve incremental build times.
Break up circular dependency involving class_linker-inl.h.

Change-Id: I4be742c5c2b5cd9855beea86630fd68aab76b0db
diff --git a/compiler/image_test.cc b/compiler/image_test.cc
index 627a42e..cfd525c 100644
--- a/compiler/image_test.cc
+++ b/compiler/image_test.cc
@@ -21,7 +21,7 @@
 #include <vector>
 
 #include "base/unix_file/fd_file.h"
-#include "class_linker.h"
+#include "class_linker-inl.h"
 #include "common_compiler_test.h"
 #include "elf_writer.h"
 #include "gc/space/image_space.h"