C and C++ FE: fix source ranges for binary ops

C and C++ FE: fix source ranges for binary ops

gcc/c-family/ChangeLog:
	* c-common.c (binary_op_error): Convert first param from
	location_t to rich_location * and use it when emitting an error.
	* c-common.h (binary_op_error): Convert first param from
	location_t to rich_location *.

gcc/c/ChangeLog:
	* c-typeck.c: Include "gcc-rich-location.h".
	(build_binary_op): In the two places that call binary_op_error,
	create a gcc_rich_location and populate it with the location of
	the binary op and its two operands.

gcc/cp/ChangeLog:
	* typeck.c (cp_build_binary_op): Update for change in signature
	of build_binary_op.  Use error_at to replace an implicit use
	of input_location with param "location" in "invalid operands"
	error.
	(cp_build_binary_op): Replace an error with an error_at, using
	"location", rather than implicitly using input_location.

gcc/testsuite/ChangeLog:
	* g++.dg/diagnostic/bad-binary-ops.C: New test case.
	* gcc.dg/bad-binary-ops.c: New test case.
	gcc.dg/plugin/diagnostic_plugin_show_trees.c (get_range_for_expr):
	Remove material copied from gcc-rich-location.c
	(gcc_rich_location::add_expr): Likewise.

From-SVN: r231884