Add note about BR copyright

Author: fhunleth

REUSE.toml

@@ -6,6 +6,7 @@ path = [
  ".github/CODEOWNERS",
  ".gitignore",
  "CHANGELOG.md",
+ "nerves_defconfig",
  "NOTICE",
  "REUSE.toml",
  "mix.exs",
@@ -25,12 +26,13 @@ SPDX-FileCopyrightText = "2019 Frank Hunleth"
 SPDX-License-Identifier = "CC-BY-4.0"
 
 # Buildroot derived or related files
+# NOTE: packages here proactively have copyright assigned to the Buildroot
+# developers to avoid worrying about copyright assignment when upstreaming.
 [[annotations]]
 path = [
  "Config.in",
  "package/**",
  "external.mk",
- "nerves_defconfig",
  "post-build.sh",
  "post-createfs.sh"
 ]