Try to fix bot build errors from r254926 by correcting the function
return type.
llvm-svn: 254934
//===----------------------------------------------------------------------===//
/// This pass performs iterative function importing from other modules.
-ModulePass *createFunctionImportPass(FunctionInfoIndex *Index = nullptr);
+Pass *createFunctionImportPass(FunctionInfoIndex *Index = nullptr);
//===----------------------------------------------------------------------===//
/// createFunctionInliningPass - Return a new pass object that uses a heuristic