Build FB RN targets only in experimental mode (#17641)

Author: gaearon

scripts/rollup/build.js

@@ -686,18 +686,18 @@ async function buildEverything() {
       [bundle, NODE_PROFILING],
       [bundle, RN_OSS_DEV],
       [bundle, RN_OSS_PROD],
-      [bundle, RN_OSS_PROFILING],
-      [bundle, RN_FB_DEV],
-      [bundle, RN_FB_PROD],
-      [bundle, RN_FB_PROFILING]
+      [bundle, RN_OSS_PROFILING]
     );
 
     if (__EXPERIMENTAL__) {
-      // www uses experimental builds only.
+      // FB specific builds are experimental-only.
       bundles.push(
         [bundle, FB_WWW_DEV],
         [bundle, FB_WWW_PROD],
-        [bundle, FB_WWW_PROFILING]
+        [bundle, FB_WWW_PROFILING],
+        [bundle, RN_FB_DEV],
+        [bundle, RN_FB_PROD],
+        [bundle, RN_FB_PROFILING]
       );
     }
   }