Reorder passMgr and out.

Author: weiweichen

llvm/unittests/CodeGen/X86MCInstLowerTest.cpp

@@ -151,9 +151,10 @@ TEST_F(X86MCInstLowerTest, moExternalSymbol_MCSYMBOL) {
   MachineModuleInfoWrapperPass *MMIWP =
       new MachineModuleInfoWrapperPass(TM.get(), &*MCFoo);
 
-  legacy::PassManager PassMgrF;
   SmallString<1024> Buf;
   llvm::raw_svector_ostream OS(Buf);
+  legacy::PassManager PassMgrF;
+
   AsmPrinter *Printer =
       addPassesToEmitFile(PassMgrF, OS, CodeGenFileType::AssemblyFile, MMIWP);
   PassMgrF.run(*M);