* configure.in (HAVE_GAS_SHF_MERGE): Always define to test result.
	Update description.
	* configure: Regenerate.
	* config.in: Likewise.
	* dwarf2out.c (DEBUG_STR_SECTION_FLAGS): Test for
	HAVE_GAS_SHF_MERGE value.
	* varasm.c (mergeable_string_section): Likewise.
	(mergeable_constant_section): Likewise.

From-SVN: r71691