Patch to improve ld --print-map output

[Nick Clifton]

Hi Richard,

> [ld/]
> 	* ldlang.c (print_assignment): Update print_dot for assignments to ".".
> 	* ldexp.c (exp_print_token): Add "infix_p" argument.
> 	(exp_print_tree): Update accordingly.
> 
> [ld/testsuite/]
> 	* ld-scripts/map-address.exp: New test.
> 	* ld-scripts/map-address.[td]: New files for it.

Approved - please apply.

Thanks very much for including a new test case as well.

Cheers
        Nick