Fixes for newer CustomFileEmission API

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

src/main/scala/chisel3/stage/ChiselAnnotations.scala

@@ -115,7 +115,7 @@ case class ChiselCircuitAnnotation(circuit: Circuit)
 
   protected def suffix: Option[String] = Some(".fir")
 
-  override def toBytes: Iterable[Byte] = OldEmitter.emit(circuit).toBytes
+  override def getBytes: Iterable[Byte] = OldEmitter.emit(circuit).getBytes
 
 }
 

src/main/scala/chisel3/stage/ChiselStage.scala

@@ -62,7 +62,7 @@ class ChiselStage extends Stage with PreservesAll[Phase] {
 
     annos
       .collectFirst {
-        case a: ChiselCircuitAnnotation => a.toBytes.get
+        case a: ChiselCircuitAnnotation => a.getBytes
       }
       .get
       .map(_.toChar)

src/main/scala/chisel3/stage/package.scala

@@ -33,7 +33,7 @@ package object stage {
       options.foreach {
         case a@ ChiselCircuitAnnotation(b) =>
           chiselCircuit = Some(b)
-          chirrtlCircuit = a.toBytes.map(_.map(_.toChar).mkString)
+          chirrtlCircuit = Some(a.getBytes.map(_.toChar).mkString)
         case _ =>
       }