build-gnu.sh: Move {ch,run}con tests to SELinux VM to avoid wrong res… #1425

Job	Run time
Build and test uufuzz examples	1m 15s
Build the fuzzers	2m 38s
Fuzz (fuzz_seq, false)	1m 13s
Fuzz (fuzz_printf, true)	3m 35s
Fuzz (fuzz_test, true)	2m 12s
Fuzz (fuzz_date, false)	1m 8s
Fuzz (fuzz_expr, true)	3m 38s
Fuzz (fuzz_parse_glob, true)	2m 0s
Fuzz (fuzz_env, false)	1m 2s
Fuzz (fuzz_sort, false)	1m 20s
Fuzz (fuzz_tr, false)	1m 44s
Fuzz (fuzz_cut, false)	1m 1s
Fuzz (fuzz_parse_size, true)	1m 8s
Fuzz (fuzz_seq_parse_number, true)	2m 8s
Fuzz (fuzz_non_utf8_paths, true)	2m 9s
Fuzz (fuzz_split, false)	1m 12s
Fuzz (fuzz_wc, false)	1m 0s
Fuzz (fuzz_cksum, false)	1m 1s
Fuzz (fuzz_echo, true)	2m 1s
Fuzz (fuzz_parse_time, true)	2m 7s
Fuzzing Summary	8s
	35m 40s

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