re PR target/25258 ([4.0 regression/hpux] gcc generates incorrect stabs debug output)

re PR target/25258 ([4.0 regression/hpux] gcc generates incorrect stabs debug output)

	PR target/25258
	* pa.c (pa_output_function_epilogue): Set cfun->machine->in_nsubspa to
	indicate function epilogue has been output.
	(pa_asm_output_mi_thunk): Likewise.
	(output_deferred_plabels): Put plabels in readonly data section when
	not generating PIC code.
	(som_output_text_section_asm_op): Use .NSUBSPA to output debug
	information.  Add assert.
	(som_output_comdat_data_section_asm_op): New function.
	(pa_som_asm_init_sections): Use som_output_comdat_data_section_asm_op
	instead of output_section_asm_op for COMDAT sections.

From-SVN: r108420