ART: Move JNI files to runtime/jni/ .

Test: Rely on TreeHugger.
Change-Id: I9cae11191ef1567ae9453be498882a7767285140
diff --git a/openjdkjvm/OpenjdkJvm.cc b/openjdkjvm/OpenjdkJvm.cc
index 975d194..be1ab78 100644
--- a/openjdkjvm/OpenjdkJvm.cc
+++ b/openjdkjvm/OpenjdkJvm.cc
@@ -48,8 +48,8 @@
 #include "common_throws.h"
 #include "gc/heap.h"
 #include "handle_scope-inl.h"
-#include "java_vm_ext.h"
-#include "jni_internal.h"
+#include "jni/java_vm_ext.h"
+#include "jni/jni_internal.h"
 #include "mirror/class_loader.h"
 #include "mirror/string-inl.h"
 #include "monitor.h"