mte: add licensing info for code that was copied from scudo

arm_mte.h

@@ -18,6 +18,9 @@ static inline void *arm_mte_create_random_tag(void *p, u64 exclusion_mask) {
 //
 // Contents of this function were copied from scudo:
 // https://android.googlesource.com/platform/external/scudo/+/refs/tags/android-14.0.0_r1/standalone/memtag.h#167
+//
+// scudo is licensed under the Apache License v2.0 with LLVM Exceptions, which is compatible with
+// the hardened_malloc's MIT license
 static inline void arm_mte_store_tags_and_clear(void *tagged_ptr, size_t len) {
     uintptr_t Begin = (uintptr_t) tagged_ptr;
     uintptr_t End = Begin + len;