du: deduplicate the input #4900

Job	Run time
Build the fuzzers	1m 37s
Run the fuzzers (fuzz_test, true)	2m 10s
Run the fuzzers (fuzz_date, false)	2m 6s
Run the fuzzers (fuzz_expr, true)	2m 18s
Run the fuzzers (fuzz_printf, false)	1m 16s
Run the fuzzers (fuzz_echo, true)	2m 15s
Run the fuzzers (fuzz_seq, false)	1m 10s
Run the fuzzers (fuzz_sort, false)	1m 21s
Run the fuzzers (fuzz_wc, false)	1m 4s
Run the fuzzers (fuzz_cut, false)	1m 19s
Run the fuzzers (fuzz_split, false)	1m 19s
Run the fuzzers (fuzz_tr, false)	1m 19s
Run the fuzzers (fuzz_env, false)	1m 12s
Run the fuzzers (fuzz_parse_glob, true)	2m 9s
Run the fuzzers (fuzz_parse_size, true)	2m 7s
Run the fuzzers (fuzz_parse_time, true)	1m 59s
Run the fuzzers (fuzz_seq_parse_number, true)	2m 8s
	28m 49s

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