Add tom 256 #3179

Job	Run time
List directories for parallelizing tests	2s
Check no_std	33s
Check (stable)	16s
Check (nightly)	30s
Check Documentation	1m 17s
Check Style	13s
Test (stable)	33s
Test assembly	8m 21s
Test (nightly)	30s
Test (cp6_782/)	5s
Test (mnt4_753/)	14m 58s
Test (mnt6_753/)	12s
Test (./bls12_381)	3m 10s
Test (./mnt6_298)	4m 51s
Test (./vesta)	1m 12s
Test (./ed_on_bls12_381_bandersnatch)	1m 3s
Test (./secp384r1)	1m 31s
Test (./bw6_767)	3m 44s
Test (./ed_on_bls12_381)	1m 15s
Test (./ed_on_mnt4_298)	1m 26s
Test (./mnt4_298)	3m 49s
Test (./bn254)	2m 11s
Test (./bls12_377)	4m 6s
Test (./secp256r1)	57s
Test (./ed25519)	1m 8s
Test (./bw6_761)	3m 48s
Test (./ed_on_bls12_377)	1m 4s
Test (./pallas)	1m 17s
Test (./ed_on_mnt4_753)	3m 45s
Test (./secp256k1)	1m 15s
Test (./ed_on_bw6_761)	57s
Test (./tom_256)	1m 8s
Test (./ed_on_cp6_782)	1m 16s
Test (./ed_on_bn254)	1m 1s
Test (./curve25519)	1m 9s
Test (./secq256k1)	1m 3s
Test (./grumpkin)	1m 16s
	1h 16m 52s

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