tree-ssa-structalias / pta: Fix some GNU coding style deviations

tree-ssa-structalias / pta: Fix some GNU coding style deviations

Fix some deviations from GNU coding style in pta files as reported by
contrib/check_GNU_style.py.  Most of these are "dot, space, space, end
of comment".

Commiting as obvious.

gcc/ChangeLog:

	* pta-andersen.cc (struct constraint_graph): Fix GNU style.
	(constraint_equal): Fix GNU style.
	(set_union_with_increment): Fix GNU style.
	(insert_into_complex): Fix GNU style.
	(merge_node_constraints): Fix GNU style.
	(unify_nodes): Fix GNU style.
	(do_ds_constraint): Fix GNU style.
	(scc_info::scc_info): Fix GNU style.
	(find_indirect_cycles): Fix GNU style.
	(equiv_class_lookup_or_add): Fix GNU style.
	(label_visit): Fix GNU style.
	(dump_pred_graph): Fix GNU style.
	(perform_var_substitution): Fix GNU style.
	(eliminate_indirect_cycles): Fix GNU style.
	(solve_graph): Fix GNU style.
	(solve_constraints): Fix GNU style.
	* tree-ssa-structalias.cc (first_vi_for_offset): Fix GNU style.
	(debug_constraint): Fix GNU style.
	* tree-ssa-structalias.h (struct constraint_expr): Fix GNU
	style.
	(struct variable_info): Fix GNU style.

Signed-off-by: Filip Kastl <fkastl@suse.cz>