Add --change-name-case <lower|upper> option

Adds an options to the FIRRTL compiler command line to schedule the
LowerCaseNames and UpperCaseNames transforms.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

src/main/scala/firrtl/stage/FirrtlAnnotations.scala

@@ -193,7 +193,18 @@ object RunFirrtlTransformAnnotation extends HasShellOptions {
             s"Unknown error when instantiating class $txName", e) }),
       helpText = "Run these transforms during compilation",
       shortOption = Some("fct"),
-      helpValueName = Some("<package>.<class>") ) )
+      helpValueName = Some("<package>.<class>") ),
+    new ShellOption[String](
+      longOption = "change-name-case",
+      toAnnotationSeq = _ match {
+        case "lower" => Seq(RunFirrtlTransformAnnotation(new firrtl.features.LowerCaseNames))
+        case "upper" => Seq(RunFirrtlTransformAnnotation(new firrtl.features.UpperCaseNames))
+        case a => throw new OptionsException(s"Unknown case '$a'. Did you misspell it?")
+      },
+      helpText = "Convert all FIRRTL names to a specific case",
+      helpValueName = Some("<lower|upper>")
+    )
+  )
 
 }