Pull slang revert to fix missized ternary constants #297

Job	Run time
define-matrix	2s
build (yosys-0.44)	5m 51s
build (0.45)	5m 56s
build (0.46)	6m 11s
build (0.47)	6m 24s
build (v0.48)	5m 47s
test-croc-boot (yosys-0.44)	3m 22s
test-compat (yosys-0.44, black-parrot)	1m 8s
test-croc-boot (v0.48)	3m 25s
test (yosys-0.44)	49s
test-compat (yosys-0.44, bsc-core_tile)	1m 1s
test (0.45)	1m 33s
test-compat (yosys-0.44, cv32e40p)	55s
test (0.46)	1m 0s
test-compat (yosys-0.44, ibex)	1m 7s
test (0.47)	53s
test-compat (yosys-0.44, opentitan)	2m 56s
test (v0.48)	55s
test-compat (yosys-0.44, rsd)	53s
test-compat (v0.48, black-parrot)	1m 4s
test-compat (v0.48, bsc-core_tile)	1m 34s
test-compat (v0.48, cv32e40p)	1m 31s
test-compat (v0.48, ibex)	55s
test-compat (v0.48, opentitan)	2m 29s
test-compat (v0.48, rsd)	58s
	58m 39s

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