ART: Move JNI files to runtime/jni/ .

Test: Rely on TreeHugger.
Change-Id: I9cae11191ef1567ae9453be498882a7767285140
diff --git a/test/common/stack_inspect.cc b/test/common/stack_inspect.cc
index fd62737..192274e 100644
--- a/test/common/stack_inspect.cc
+++ b/test/common/stack_inspect.cc
@@ -20,7 +20,7 @@
 
 #include "base/mutex.h"
 #include "dex/dex_file-inl.h"
-#include "jni_internal.h"
+#include "jni/jni_internal.h"
 #include "mirror/class-inl.h"
 #include "nth_caller_visitor.h"
 #include "oat_file.h"