Fix a use after free when the streamer is destroyed. Fixes pr12622.

llvm-svn: 156606

tools/lto/LTOModule.cpp

@@ -409,7 +409,7 @@ void LTOModule::addAsmGlobalSymbol(const char *name,
     // much.
 
     // fill information structure
-    info.name = name;
+    info.name = entry.getKey().data();
     info.attributes =
       LTO_SYMBOL_PERMISSIONS_DATA | LTO_SYMBOL_DEFINITION_REGULAR | scope;
     info.isFunction = false;