objc-act.c: Change annotate_with_locus to SET_EXPR_LOCATION throughout.

objc:
	* objc-act.c: Change annotate_with_locus to SET_EXPR_LOCATION
	throughout.
	(objc_init): Only set input_line to 0 #ifndef USE_MAPPED_LOCATION.
	(build_selector_translation_table): Use %J in diagnostic
	instead of diddling input_line.  Fix spelling.
testsuite:
	* objc.dg/proto-lossage-4.m: Use long instead of int to avoid
	extra diagnostics on targets with 64-bit pointers.
	* objc.dg/selector-1.m: Adjust dg-warning regexp.

From-SVN: r88072