* defaults.h (DWARF2_GENERATE_TEXT_SECTION_LABEL): New macro.
	* tm.texi (DWARF2_GENERATE_TEXT_SECTION_LABEL): Define it.
 	* dwarf2out.c (dwarf2out_init): Don't output a label to mark the
 	start of the text section if DWARF2_GENERATE_TEXT_SECTION_LABEL is
	false.
	* config/mips/iris6.h (DWARF2_GENERATE_TEXT_SECTION_LABEL):
	Define to zero.

From-SVN: r28213