test: Add crc32c to subtree check linter

ci/lint/06_script.sh

@@ -14,6 +14,7 @@ test/lint/git-subtree-check.sh src/crypto/ctaes
 test/lint/git-subtree-check.sh src/secp256k1
 test/lint/git-subtree-check.sh src/univalue
 test/lint/git-subtree-check.sh src/leveldb
+test/lint/git-subtree-check.sh src/crc32c
 test/lint/check-doc.py
 test/lint/check-rpc-mappings.py .
 test/lint/lint-all.sh

test/lint/README.md

@@ -21,6 +21,7 @@ maintained:
 * for `src/leveldb`: https://github.com/bitcoin-core/leveldb.git (branch bitcoin-fork)
 * for `src/univalue`: https://github.com/bitcoin-core/univalue.git (branch master)
 * for `src/crypto/ctaes`: https://github.com/bitcoin-core/ctaes.git (branch master)
+* for `src/crc32c`: https://github.com/google/crc32c.git (branch master)
 
 Usage: `git-subtree-check.sh DIR (COMMIT)`