[test] Test after randomization in SimulatorSpec (#4981)

Fix an inconsistency in the SimulatorSpec where, if you convert it to run
with VCS, this will then have FIRRTL randomization occurr at time 1.  The
test starts before this and several tests will then fail.

Fixes #4980.

Signed-off-by: Schuyler Eldridge <[email protected]>

Author: seldridge

src/test/scala-2/chiselTests/simulator/SimulatorSpec.scala

@@ -59,6 +59,7 @@ class SimulatorSpec extends AnyFunSpec with Matchers {
         .simulate(new GCD()) { module =>
           import PeekPokeAPI._
           val gcd = module.wrapped
+          gcd.clock.step(2)
           gcd.io.a.poke(24.U)
           gcd.io.b.poke(36.U)
           gcd.io.loadValues.poke(1.B)
@@ -79,6 +80,7 @@ class SimulatorSpec extends AnyFunSpec with Matchers {
           .simulate(new GCD()) { module =>
             import PeekPokeAPI._
             val gcd = module.wrapped
+            gcd.clock.step(2)
             gcd.io.a.poke(24.U)
             gcd.io.b.poke(36.U)
             gcd.io.loadValues.poke(1.B)
@@ -266,6 +268,7 @@ class SimulatorSpec extends AnyFunSpec with Matchers {
         .simulate(new SimpleModule) { module =>
           import PeekPokeAPI._
           val dut = module.wrapped
+          dut.viewOfClock.step(2)
           dut.io.in.poke(12.U)
           dut.viewOfClock.step(1)
           dut.io.out.peek()