[MacPorts] #31977: mercurial: simplify getting archflags

#31977: mercurial: simplify getting archflags -------------------------------------+-------------------------------------- Reporter: ryandesign@… | Owner: deric@… Type: enhancement | Status: new Priority: Normal | Milestone: Component: ports | Version: 2.0.3 Keywords: haspatch | Port: mercurial -------------------------------------+-------------------------------------- This patch simplifies how mercurial gets the canonical archflags. -- Ticket URL: <https://trac.macports.org/ticket/31977> MacPorts <http://www.macports.org/> Ports system for Mac OS