Fix build failure on GCC 4.7 (old libstdc++ doesn't have std::map::emplace).

llvm-svn: 251347
diff --git a/llvm/lib/DebugInfo/Symbolize/Symbolize.cpp b/llvm/lib/DebugInfo/Symbolize/Symbolize.cpp
index aa24dd9..ecdb089 100644
--- a/llvm/lib/DebugInfo/Symbolize/Symbolize.cpp
+++ b/llvm/lib/DebugInfo/Symbolize/Symbolize.cpp
@@ -530,7 +530,8 @@
 
   if (!Objects.first) {
     // Failed to find valid object file.
-    Modules.insert(make_pair(ModuleName, nullptr));
+    Modules.insert(
+        std::make_pair(ModuleName, std::unique_ptr<ModuleInfo>(nullptr)));
     return nullptr;
   }
   std::unique_ptr<DIContext> Context;
@@ -549,7 +550,7 @@
   assert(Context);
   auto Info = llvm::make_unique<ModuleInfo>(Objects.first, std::move(Context));
   ModuleInfo *Res = Info.get();
-  Modules.emplace(ModuleName, std::move(Info));
+  Modules.insert(std::make_pair(ModuleName, std::move(Info)));
   return Res;
 }