Merge pull request #6802 from andrewliebenow/mkdir-empty-argument-fix #684

Job	Run time
Build the fuzzers	3m 44s
Run the fuzzers (fuzz_test, true)	4m 2s
Run the fuzzers (fuzz_date, false)	3m 53s
Run the fuzzers (fuzz_expr, true)	3m 58s
Run the fuzzers (fuzz_printf, false)	2m 53s
Run the fuzzers (fuzz_echo, true)	2m 24s
Run the fuzzers (fuzz_seq, false)	2m 56s
Run the fuzzers (fuzz_sort, false)	3m 8s
Run the fuzzers (fuzz_wc, false)	3m 0s
Run the fuzzers (fuzz_cut, false)	3m 3s
Run the fuzzers (fuzz_split, false)	3m 7s
Run the fuzzers (fuzz_tr, false)	1m 32s
Run the fuzzers (fuzz_env, false)	2m 55s
Run the fuzzers (fuzz_parse_glob, true)	3m 51s
Run the fuzzers (fuzz_parse_size, true)	3m 49s
Run the fuzzers (fuzz_parse_time, true)	3m 50s
Run the fuzzers (fuzz_seq_parse_number, true)	3m 45s
	55m 50s

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