vm: very basic virtual machine

stdlib/src/main/kotlin/gay/pizza/pork/stdlib/PorkStdlib.kt

@@ -34,7 +34,7 @@ object PorkStdlib : ContentSource {
     return StringCharSource(readPorkFile(path))
   }
 
-  override fun stableContentIdentity(path: String): String {
+  override fun stableContentPath(path: String): String {
     return path
   }
 }

stdlib/src/main/pork/ffi/struct.pork

@@ -1,7 +1,7 @@
 export func ffiStructDefine(items...)
   native ffi "internal" "ffiStructDefine"
 
-export func ffiStructAllocate(struct)
+export func ffiStructAllocate(def)
   native ffi "internal" "ffiStructAllocate"
 
 export func ffiStructValue(def, field, value)