install: fix error messages to align with GNU for cannot-stat and failed-to-remove. #4955

Job	Run time
Run benchmarks (CodSpeed) (uu_dd)	1m 35s
Run benchmarks (CodSpeed) (uu_ls)	3m 38s
Run benchmarks (CodSpeed) (uu_du)	1m 30s
Run benchmarks (CodSpeed) (uu_fold)	1m 42s
Run benchmarks (CodSpeed) (uu_expand)	1m 35s
Run benchmarks (CodSpeed) (uu_join)	1m 43s
Run benchmarks (CodSpeed) (uu_base64)	8m 10s
Run benchmarks (CodSpeed) (uu_cp)	2m 2s
Run benchmarks (CodSpeed) (uu_cut)	2m 9s
Run benchmarks (CodSpeed) (uu_mv)	1m 39s
Run benchmarks (CodSpeed) (uu_cksum)	7m 44s
Run benchmarks (CodSpeed) (uu_numfmt)	1m 55s
Run benchmarks (CodSpeed) (uu_nl)	1m 38s
Run benchmarks (CodSpeed) (uu_factor)	2m 50s
Run benchmarks (CodSpeed) (uu_date)	1m 35s
Run benchmarks (CodSpeed) (uu_shuf)	1m 35s
Run benchmarks (CodSpeed) (uu_seq)	1m 33s
Run benchmarks (CodSpeed) (uu_split)	1m 25s
Run benchmarks (CodSpeed) (uu_rm)	2m 2s
Run benchmarks (CodSpeed) (uu_wc)	10m 35s
Run benchmarks (CodSpeed) (uu_unexpand)	1m 52s
Run benchmarks (CodSpeed) (uu_sort)	5m 37s
Run benchmarks (CodSpeed) (uu_tsort)	2m 31s
Run benchmarks (CodSpeed) (uu_uniq)	1m 20s
	1h 9m 55s

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