Method truncateFile

fdbserver/DiskQueue.actor.cpp:298–298

	Int64MetricHandle stallCount;

	Future<Void> truncateFile(int file, int64_t pos) { return truncateFile(this, file, pos); }

	// FIXME: Merge this function with IAsyncFileSystem::incrementalDeleteFile().
	ACTOR static void incrementalTruncate(Reference<IAsyncFile> file) {