build: i18n: revert spurious change

Author: srl295

src/node.cc

@@ -3632,7 +3632,7 @@ Environment* CreateEnvironment(Isolate* isolate,
 
 
 int Start(int argc, char** argv) {
-  const char* replaceInvalid = getenv("NODE_ISOLATEINVALID_UTF8");
+  const char* replaceInvalid = getenv("NODE_INVALID_UTF8");
 
   if (replaceInvalid == NULL)
     WRITE_UTF8_FLAGS |= String::REPLACE_INVALID_UTF8;