Fix bootstap-errors due to enabling -gvariable-location-views

This recent change triggered various bootstap-errors, mostly on
x86 targets because line info advance address entries were output
in the wrong section table.
The switch to the wrong line table happened in dwarfout_set_ignored_loc.
It must use the same section as the earlier called
dwarf2out_switch_text_section.

But also ft32-elf was affected, because the assembler choked on
something simple as ".2byte .LM2-.LM1", but fortunately it is
able to use native location views, the configure test was just
not executed because the ft32 "nop" instruction was missing.

gcc/ChangeLog:

	PR debug/116470
	* configure.ac: Add the "nop" instruction for cpu type ft32.
	* configure: Regenerate.
	* dwarf2out.cc (dwarf2out_set_ignored_loc): Use the correct
	line info section.