ldmisc.h (einfo, minfo, info): Don't bother with PARAMS macro when no

ldmisc.h (einfo, minfo, info): Don't bother with PARAMS macro when no
prototype is being supplied.
(ldmalloc, ldrealloc): Size argument is now size_t.

ldmisc.c (finfo): New function, accepts FILE* argument.
(vfinfo, case 'v'): New format character; displays bfd_vma in hex without
leading zeros.
(vfinfo, cases 'R' and 'C'): Use finfo(%v) when displaying a bfd_vma value,
instead of fprintf(%x) which won't hold a long long value.
(concat, buystring): String lengths are size_t.
(ldmalloc, ldrealloc, xrealloc): Size argument is now size_t.