update BUILD files

vendor/github.com/vishvananda/netlink/BUILD

@@ -50,6 +50,7 @@ go_library(
         "//conditions:default": [],
     }),
     cgo = True,
+    importpath = "github.com/vishvananda/netlink",
     visibility = ["//visibility:public"],
     deps = [
         "//vendor/github.com/vishvananda/netlink/nl:go_default_library",

vendor/github.com/vishvananda/netlink/nl/BUILD

@@ -23,6 +23,7 @@ go_library(
         ],
         "//conditions:default": [],
     }),
+    importpath = "github.com/vishvananda/netlink/nl",
     visibility = ["//visibility:public"],
     deps = select({
         "@io_bazel_rules_go//go/platform:linux_amd64": [

vendor/github.com/vishvananda/netns/BUILD

@@ -11,6 +11,7 @@ go_library(
         ],
         "//conditions:default": [],
     }),
+    importpath = "github.com/vishvananda/netns",
     visibility = ["//visibility:public"],
 )