Merge pull request swiftlang#78551 from ahoppen/module-alias-in-old-driver

[Driver] Forward the `-module-alias` arguments from the driver to the frontend

Author: ahoppen

lib/Driver/ToolChains.cpp

@@ -351,6 +351,7 @@ void ToolChain::addCommonFrontendArgs(const OutputInfo &OI,
   inputArgs.AddLastArg(arguments, options::OPT_enable_builtin_module);
   inputArgs.AddLastArg(arguments, options::OPT_compiler_assertions);
   inputArgs.AddLastArg(arguments, options::OPT_load_pass_plugin_EQ);
+  inputArgs.AddAllArgs(arguments, options::OPT_module_alias);
 
   // Pass on any build config options
   inputArgs.AddAllArgs(arguments, options::OPT_D);