Revert "THRIFT-5501 Remove Common Lisp support"

This reverts commit d88d4f93b3390989bd47a43f3941ca7d576750f6.
diff --git a/lib/cl/Makefile.am b/lib/cl/Makefile.am
new file mode 100644
index 0000000..34b3886
--- /dev/null
+++ b/lib/cl/Makefile.am
@@ -0,0 +1,40 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+THRIFT = $(top_builddir)/compiler/cpp/thrift
+
+all-local:
+	bash ensure-externals.sh
+
+run-tests: test/make-test-binary.lisp
+	$(SBCL) --script test/make-test-binary.lisp
+
+check-local: run-tests
+	./run-tests
+
+clean-local:
+	$(RM) run-tests quicklisp.lisp backport-update.zip
+	$(RM) -rf lib externals quicklisp
+
+EXTRA_DIST = \
+	README.md \
+	READMES \
+	load-locally.lisp \
+	test \
+	ensure-externals.sh