hst: optionally cover /run/ early

This works around awkward root permissions.

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/app/app.go

@@ -83,6 +83,8 @@ func parse(id string, base *check.Absolute, r io.Reader) (*hst.Config, error) {
 			Home:     home,
 			Path:     shell,
 			Args:     []string{"zsh", "-c"},
+
+			Flags: hst.FCoverRun,
 		},
 	}
 

cmd/app/app_test.go

@@ -122,7 +122,7 @@ talk com.canonical.Unity
 					"exec Discord --ozone-platform-hint=wayland",
 				},
 
-				Flags: hst.FUserns | hst.FHostNet | hst.FMapRealUID |
+				Flags: hst.FCoverRun | hst.FUserns | hst.FHostNet | hst.FMapRealUID |
 					hst.FShareRuntime | hst.FShareTmpdir,
 			},
 		}, nil},