Ahead of his gig in The Brú on Friday night, Mike McGrath-Bryan speaks with singer/guitarist Marty Ryan, a.k.a. Anna’s Anchor. Limerick man Marty Ryan, a.k.a. Anna’s Anchor, stops in Cork on Friday night in a full-band show at the Brú on McCurtain Street. Adopting his nom-de-plume for both solo and ensemble recording projects, it has…