Add a few more missing includes.



git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@105743 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/driver/Driver.cpp b/tools/driver/Driver.cpp
index 85268ae..0ae5187 100644
--- a/tools/driver/Driver.cpp
+++ b/tools/driver/Driver.cpp
@@ -17,6 +17,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <limits.h>
+#include <fcntl.h>
 
 #include <string>