ART: Move JNI files to runtime/jni/ .

Test: Rely on TreeHugger.
Change-Id: I9cae11191ef1567ae9453be498882a7767285140
diff --git a/openjdkjvmti/ti_stack.cc b/openjdkjvmti/ti_stack.cc
index 4526be4..eee8108 100644
--- a/openjdkjvmti/ti_stack.cc
+++ b/openjdkjvmti/ti_stack.cc
@@ -50,8 +50,8 @@
 #include "dex/dex_file_types.h"
 #include "gc_root.h"
 #include "handle_scope-inl.h"
-#include "jni_env_ext.h"
-#include "jni_internal.h"
+#include "jni/jni_env_ext.h"
+#include "jni/jni_internal.h"
 #include "mirror/class.h"
 #include "mirror/dex_cache.h"
 #include "nativehelper/scoped_local_ref.h"