ART: Move JNI files to runtime/jni/ .

Test: Rely on TreeHugger.
Change-Id: I9cae11191ef1567ae9453be498882a7767285140
diff --git a/openjdkjvmti/jvmti_weak_table-inl.h b/openjdkjvmti/jvmti_weak_table-inl.h
index 6990042..d9b8a84 100644
--- a/openjdkjvmti/jvmti_weak_table-inl.h
+++ b/openjdkjvmti/jvmti_weak_table-inl.h
@@ -41,7 +41,7 @@
 #include "art_jvmti.h"
 #include "gc/allocation_listener.h"
 #include "instrumentation.h"
-#include "jni_env_ext-inl.h"
+#include "jni/jni_env_ext-inl.h"
 #include "jvmti_allocator.h"
 #include "mirror/class.h"
 #include "mirror/object.h"