Run hack/update-bazel.sh to generate BUILD files

Kubernetes-commit: 3579017b865ddbc5449d6bba87346f086e4b93ff

util/exec/BUILD

@@ -12,3 +12,16 @@ go_library(
     srcs = ["exec.go"],
     tags = ["automanaged"],
 )
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+)