Update package/license declarations

examples/rule_based_toolchain/BUILD

@@ -14,6 +14,10 @@
 
 load("@rules_cc//cc:defs.bzl", "cc_test")
 
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])
+
 cc_test(
     name = "quick_test",
     srcs = ["quick_test.cc"],

examples/rule_based_toolchain/dynamic_answer/BUILD

@@ -16,7 +16,7 @@ load("@rules_cc//cc:defs.bzl", "cc_library", "cc_shared_library")
 
 package(default_visibility = ["//visibility:public"])
 
-licenses(["notice"])  # Apache 2.0
+licenses(["notice"])
 
 cc_library(
     name = "headers",

examples/rule_based_toolchain/static_answer/BUILD

@@ -16,7 +16,7 @@ load("@rules_cc//cc:defs.bzl", "cc_library")
 
 package(default_visibility = ["//visibility:public"])
 
-licenses(["notice"])  # Apache 2.0
+licenses(["notice"])
 
 cc_library(
     name = "answer",

examples/rule_based_toolchain/toolchain/BUILD

@@ -15,6 +15,10 @@
 load("@rules_cc//cc/toolchains:args.bzl", "cc_args")
 load("@rules_cc//cc/toolchains:toolchain.bzl", "cc_toolchain")
 
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])
+
 # For now, each toolchain is only declared to be compatible
 # when exec_platform == target_platform.
 PLATFORMS = {

examples/rule_based_toolchain/toolchain/linux_sysroot.BUILD

@@ -18,6 +18,8 @@ load("@rules_cc//cc/toolchains/args:sysroot.bzl", "cc_sysroot")
 
 package(default_visibility = ["//visibility:public"])
 
+licenses(["notice"])
+
 cc_sysroot(
     name = "sysroot",
     data = [