Generate kcachegrind reports under line granularity

Callgrind reports are generated with line granularity since kcachegrind
can take advantage of the information. However, kcachegrind reports were
not being generated with that granularity, creating an unnecessary difference.

internal/driver/driver.go

@@ -135,7 +135,7 @@ func applyCommandOverrides(cmd []string, v variables) variables {
 		v.set("addressnoinlines", "t")
 	case "peek":
 		trim, focus, hide = false, false, false
-	case "callgrind", "list":
+	case "kcachegrind", "callgrind", "list":
 		v.set("nodecount", "0")
 		v.set("lines", "t")
 	case "text", "top", "topproto":