Revert r118057, this is better fixed in appendSuffix itself.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118088 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/SystemUtils.cpp b/lib/Support/SystemUtils.cpp
index 8d70616..db61e75 100644
--- a/lib/Support/SystemUtils.cpp
+++ b/lib/Support/SystemUtils.cpp
@@ -47,9 +47,7 @@
 
   if (!Result.isEmpty()) {
     Result.appendComponent(ExeName);
-    StringRef EXESuffix = sys::Path::GetEXESuffix();
-    if (!EXESuffix.empty())
-      Result.appendSuffix(EXESuffix);
+    Result.appendSuffix(sys::Path::GetEXESuffix());
   }
 
   return Result;