Fix up warnings from gcc -Wall:

	Fix up warnings from gcc -Wall:
	* coffgen.c (coff_print_symbol): Use %lx and cast n_value to
	unsigned long.  Use %ld for tagndx.  Use %lx for offset + vma and
	cast it to unsigned long.
	* ecoff.c (ecoff_emit_aggregate): Use %ld.
	(ecoff_print_symbol): Use %ld, and cast indx and sym_base to long.
	* coffcode.h (dummy_reloc16_estimate): Specify return type.