Correct extended error for binary_to_term/2

[bjorng]

When binary_to_term/2 failed with a badarg exception, the extended error
information would always blame the second argument even if the error was
in the first argument:

1> binary_to_term(<<"">>, []).
** exception error: bad argument
     in function  binary_to_term/2
        called as binary_to_term(<<>>,[])
        *** argument 2: invalid option in list
2> binary_to_term(<<131,100,0,10,97,95,110,101,119,95,97,116,111,109>>, [safe]).
** exception error: bad argument
     in function  binary_to_term/2
        called as binary_to_term(<<131,100,0,10,97,95,110,101,119,95,97,116,111,109>>,
                                 [safe])
        *** argument 2: invalid option in list

Correct the extended error information like this:

1> binary_to_term(<<"">>, []).
** exception error: bad argument
     in function  binary_to_term/2
        called as binary_to_term(<<>>,[])
        *** argument 1: invalid external representation of a term
2> binary_to_term(<<131,100,0,10,97,95,110,101,119,95,97,116,111,109>>, [safe]).
** exception error: bad argument
     in function  binary_to_term/2
        called as binary_to_term(<<131,100,0,10,97,95,110,101,119,95,97,116,111,109>>,
                                 [safe])
        *** argument 1: invalid or unsafe external representation of a term

Closes #5171.

[nathanl]

👏 🎉 😄 Thank you!