Add support deterministic output in llvm-ar and make it the default.

llvm-svn: 242061
diff --git a/llvm/lib/LibDriver/LibDriver.cpp b/llvm/lib/LibDriver/LibDriver.cpp
index 4a9fa28..b33a22f 100644
--- a/llvm/lib/LibDriver/LibDriver.cpp
+++ b/llvm/lib/LibDriver/LibDriver.cpp
@@ -141,7 +141,8 @@
 
   std::pair<StringRef, std::error_code> Result =
       llvm::writeArchive(getOutputPath(&Args, Members[0]), Members,
-                         /*WriteSymtab=*/true, object::Archive::K_GNU);
+                         /*WriteSymtab=*/true, object::Archive::K_GNU,
+                         /*Deterministic*/ true);
 
   if (Result.second) {
     if (Result.first.empty())