ModuleInterface: sanitize arch when interface file name and encoded flags disagree

It's a known issue that we are using arm64e interfaces contents for the arm64 target,
meaning the encoded module flags are specifying -target arm64e-x-x instead of
-target arm64-x-x. Fortunately, we can tell the target arch from the interface file
name, so we could sanitize the target to use by inferring arch from the file name.

lib/Frontend/ModuleInterfaceLoader.cpp

@@ -1346,7 +1346,7 @@ bool InterfaceSubContextDelegateImpl::extractSwiftInterfaceVersionAndArgs(
              diag::error_extracting_version_from_module_interface);
     return true;
   }
-  if (extractCompilerFlagsFromInterface(SB, ArgSaver, SubArgs)) {
+  if (extractCompilerFlagsFromInterface(interfacePath, SB, ArgSaver, SubArgs)) {
     diagnose(interfacePath, diagnosticLoc,
              diag::error_extracting_version_from_module_interface);
     return true;