BFD long long cleanup

BFD long long cleanup

long long isn't supposed to be used without a configure test, to
support ancient compilers.  Probably not terribly important nowadays.

	* bfd.c (bfd_scan_vma): Don't use long long unless HAVE_LONG_LONG.
	* coff-rs6000.c (FMT20): Handle hosts with 64-bit long and
	Microsoft C library variant of long long format specifier.
	(PRINT20): Cast value to bfd_uint64_t not long long.
	* coffcode.h (coff_print_aux): Use BFD_VMA_FMT.
	* coff-x86_64.c (coff_amd64_reloc): Use bfd_uint64_t rather than
	long long.  Don't cast to bfd_vma.
	* elf32-score.c (score3_bfd_getl48): Likewise.
	* vms-alpha.c (_bfd_vms_slurp_eisd): Likewise.