THRIFT-4547: Swift crosstests (#2670)

Co-authored-by: Jiayu Liu <Jimexist@users.noreply.github.com>
diff --git a/.gitignore b/.gitignore
index a469311..d4c5dd7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -49,6 +49,7 @@
 erl_crash.dump
 project.lock.json
 
+.Dockerfile.sha512
 .sonar
 .DS_Store
 .svn
@@ -388,6 +389,7 @@
 /test/rs/target/
 /test/rs/*.iml
 /test/rs/**/*.iml
+/test/swift/CrossTests/.build
 /lib/cl/backport-update.zip
 /lib/cl/lib
 /tutorial/cl/quicklisp.lisp