* config/tc-xtensa.c (xg_assemble_vliw_tokens): Record loop target

	symbols in RELAX[_CHECK]_ALIGN_NEXT_OPCODE frags.
	(xtensa_fix_close_loop_end_frags): Use the recorded values instead of
	decoding the loop instructions.  Remove current_offset variable.
	(xtensa_fix_short_loop_frags): Likewise.
	(min_bytes_to_other_loop_end): Remove current_offset argument.