Assorted compiler warning fixes

Assorted compiler warning fixes

The C standard doesn't guarantee a function pointer can be cast to
void* and vice versa.

binutils/
	* prdbg.c (print_debugging_info): Don't use void* for function
	pointer param.
	* budbg.h (print_debugging_info): Update prototype.
gas/
	* read.c (s_altmacro, s_reloc): Make definition static.