Add getExec method for SwiftCommandLineOptions.

Part of work on execution transitions, #7935.

PiperOrigin-RevId: 245428827
diff --git a/src/main/java/com/google/devtools/build/lib/rules/apple/swift/SwiftCommandLineOptions.java b/src/main/java/com/google/devtools/build/lib/rules/apple/swift/SwiftCommandLineOptions.java
index bf81f91..f605e8f 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/apple/swift/SwiftCommandLineOptions.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/apple/swift/SwiftCommandLineOptions.java
@@ -47,4 +47,11 @@
     host.copts = this.hostSwiftcoptList;
     return host;
   }
+
+  @Override
+  public FragmentOptions getExec() {
+    SwiftCommandLineOptions exec = (SwiftCommandLineOptions) super.getExec();
+    exec.copts = this.hostSwiftcoptList;
+    return exec;
+  }
 }