Use binary mode for reading/writing bytecode files

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19751 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-ar/llvm-ar.cpp

@@ -436,7 +436,9 @@ void doExtract() {
       }
 
       // Open up a file stream for writing
-      std::ofstream file(I->getPath().c_str());
+      std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
+                                   std::ios::binary;
+      std::ofstream file(I->getPath().c_str(), io_mode);
 
       // Get the data and its length
       const char* data = reinterpret_cast<const char*>(I->getData());