PR21732, String-concatenated message can not be translated

PR21732, String-concatenated message can not be translated

Preprocessor tokens like DWARF_VMA_FMT and BFD_VMA_FMT are not
understood by gettext, and cause the translation string to be
truncated.  Even if it were not truncated, we wouldn't want a value
that changes depending on host or configure options to be put in a
translation string.

	PR 21732
	* dwarf.c (READ_ULEB): Don't use DWARF_VMA_FMT in translated string.
	(READ_SLEB): Likewise.
	* readelf.c (bfd_vmatoa): New function.
	(get_data, get_dynamic_data): Use it for printing error messages.