Simplify.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118110 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Unix/Path.inc b/lib/System/Unix/Path.inc
index 15cbcab..b7afb85 100644
--- a/lib/System/Unix/Path.inc
+++ b/lib/System/Unix/Path.inc
@@ -692,8 +692,7 @@
   pathname[lastchar] = '\0';
 
   if (createDirectoryHelper(&pathname[0], &pathname[lastchar], create_parents))
-    return MakeErrMsg(ErrMsg,
-                      std::string(pathname) + ": can't create directory");
+    return MakeErrMsg(ErrMsg, pathname + ": can't create directory");
 
   return false;
 }