Merge pull request #33207 from xymus/spi-ioi-check-workaround

[ModuleInterface] Print some implementation-only imports in the private interface

include/swift/Frontend/ModuleInterfaceSupport.h

@@ -43,6 +43,10 @@ struct ModuleInterfaceOptions {
 
   // Print SPI decls and attributes.
   bool PrintSPIs = false;
+
+  /// Print imports with both @_implementationOnly and @_spi, only applies
+  /// when PrintSPIs is true.
+  bool ExperimentalSPIImports = false;
 };
 
 extern version::Version InterfaceFormatVersion;