ART: Move JNI files to runtime/jni/ .

Test: Rely on TreeHugger.
Change-Id: I9cae11191ef1567ae9453be498882a7767285140
diff --git a/runtime/class_loader_utils.h b/runtime/class_loader_utils.h
index 1439f11..af42878 100644
--- a/runtime/class_loader_utils.h
+++ b/runtime/class_loader_utils.h
@@ -20,7 +20,7 @@
 #include "art_field-inl.h"
 #include "base/mutex.h"
 #include "handle_scope.h"
-#include "jni_internal.h"
+#include "jni/jni_internal.h"
 #include "mirror/class_loader.h"
 #include "native/dalvik_system_DexFile.h"
 #include "scoped_thread_state_change-inl.h"