Stratosphere: Add lz4 library, add GetContentPath primitive to loader.

stratosphere/loader/source/ldr_location_resolver.hpp

@@ -0,0 +1,7 @@
+#pragma once
+#include <switch.h>
+
+#include "ldr_registration.hpp"
+
+Result GetContentPath(char *out_path, u64 tid, FsStorageId sid);
+Result GetContentPathForTidSid(char *out_path, Registration::TidSid *tid_sid);