[lldb] [llvm] [lldb] Fix write only file action to truncate the file (PR #112657)

[Alex Langford via llvm-commits]

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@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include <fcntl.h>
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bulbazord wrote:

Will this work on windows? 

https://github.com/llvm/llvm-project/pull/112657