Handle ifdef for local variables.

Fixes: 205337522
Test: internal
Change-Id: Ib29654e76e8dc7c0982bfe0b471a1aca33935117
diff --git a/mk2rbc/variable.go b/mk2rbc/variable.go
index 4bb9ed5..ded07fe 100644
--- a/mk2rbc/variable.go
+++ b/mk2rbc/variable.go
@@ -177,8 +177,8 @@
 	baseVariable
 }
 
-func (lv localVariable) emitDefined(_ *generationContext) {
-	panic("implement me")
+func (lv localVariable) emitDefined(gctx *generationContext) {
+	gctx.writef(lv.String())
 }
 
 func (lv localVariable) String() string {