libbfc.c: Use stdint types for unsigned char and unsigned long

	* libbfd.c (bfd_put_8): Use bfd_byte rather than unsigned char.
	(bfd_get_8, bfd_get_signed_8): Likewise.
	(_bfd_read_unsigned_leb128, _bfd_safe_read_leb128): Likewise.
	(_bfd_read_signed_leb128): Likewise.
	(bfd_getb24, bfd_getl24): Replace unsigned long with uint32_t.
	(bfd_getb32, bfd_getl32): Likewise.
	(bfd_getb_signed_32, bfd_getl_signed_32): Likewise.