On the title track of “This Land,” Gary Clark Jr. is staking his claim to a literal place on the map, settling in and declaring: “I told you there goes the neighborhood… This is mine now, legit.” It’s a song with real-life roots in how Clark and his family have traded up in turf in his native Texas and been met with some suspicious glances upon move-in. And if it sounds like he’s had some practice in defiantly ignoring expectations about where he ought to live, well, that’s something he’s been doing musically his whole life. He’s a rock-and-soul omnivore who can survey the entire landscape of American music — not just the blues with which he’s so often associated, but reggae, punk, R'n'B and hip-hop, too — and say: This land was made for you and me.