Update to v106r65 release.

byuu says:

This synchronizes bsnes/higan with many recent internal nall changes.

This will be the last WIP until I am situated in Japan. Apologies for the
bugfixes that didn't get applied yet, I ran out of time.

nall/string/utility.hpp

@@ -18,7 +18,7 @@ auto string::read(string_view filename) -> string {
 
   rewind(fp);
   result.resize(filesize);
-  auto unused = fread(result.get(), 1, filesize, fp);
+  (void)fread(result.get(), 1, filesize, fp);
   return fclose(fp), result;
 }