ART: Move JNI files to runtime/jni/ .

Test: Rely on TreeHugger.
Change-Id: I9cae11191ef1567ae9453be498882a7767285140
diff --git a/openjdkjvmti/ti_class_loader.cc b/openjdkjvmti/ti_class_loader.cc
index 3df5de9..9a32849 100644
--- a/openjdkjvmti/ti_class_loader.cc
+++ b/openjdkjvmti/ti_class_loader.cc
@@ -46,7 +46,7 @@
 #include "instrumentation.h"
 #include "jit/jit.h"
 #include "jit/jit_code_cache.h"
-#include "jni_env_ext-inl.h"
+#include "jni/jni_env_ext-inl.h"
 #include "jvmti_allocator.h"
 #include "mirror/class.h"
 #include "mirror/class_ext.h"