C1: fix "assert(has_printable_bci()) failed: _printable_bci should have been set" when using -XX:+PrintCanonicalization

[Roland Westrelin]

Hi Kris,

Why not simply not print the bci in InstructionPrinter::print_line() when is_linked() is false for the instruction?

I think this would restore the behavior before the _printable_bci stuff was introduced by 6986046.

Roland.