Micro-optimize.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118058 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Unix/Path.inc b/lib/System/Unix/Path.inc
index 44c81a2..254d4de 100644
--- a/lib/System/Unix/Path.inc
+++ b/lib/System/Unix/Path.inc
@@ -79,7 +79,7 @@
 const char sys::PathSeparator = ':';
 
 StringRef Path::GetEXESuffix() {
-  return "";
+  return StringRef();
 }
 
 Path::Path(StringRef p)