On error, close the temporary file descriptor.

With this change llvm-ar can remove the temporary file on windows too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186423 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-ar/llvm-ar.cpp b/tools/llvm-ar/llvm-ar.cpp
index 32bcb49..d65f9ec 100644
--- a/tools/llvm-ar/llvm-ar.cpp
+++ b/tools/llvm-ar/llvm-ar.cpp
@@ -41,10 +41,13 @@
 static StringRef ToolName;
 
 static const char *TemporaryOutput;
+static int TmpArchiveFD = -1;
 
 // fail - Show the error message and exit.
 LLVM_ATTRIBUTE_NORETURN static void fail(Twine Error) {
   outs() << ToolName << ": " << Error << ".\n";
+  if (TmpArchiveFD != -1)
+    close(TmpArchiveFD);
   if (TemporaryOutput)
     sys::fs::remove(TemporaryOutput);
   exit(1);
@@ -526,7 +529,6 @@
 
 static void performWriteOperation(ArchiveOperation Operation,
                                   object::Archive *OldArchive) {
-  int TmpArchiveFD;
   SmallString<128> TmpArchive;
   failIfError(sys::fs::createUniqueFile(ArchiveName + ".temp-archive-%%%%%%%.a",
                                         TmpArchiveFD, TmpArchive));