Add a LINT_CONSTRUCTOR_PARENTHESES rule to ArcanistXHPASTLinter

Summary: Adds an ArcanistXHPASTLinter::LINT_CONSTRUCTOR_PARENTHESES rule which ensures that (possibly empty) parentheses are used when calling a constructor.

Test Plan: Added test cases.

Reviewers: Blessed Reviewers, epriestley

Reviewed By: Blessed Reviewers, epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10597