[DevTools] Commands for internal builds all follow :fb convention (facebook#22463)

Author: Juan

packages/react-devtools-extensions/package.json

@@ -6,12 +6,12 @@
     "build": "cross-env NODE_ENV=production yarn run build:chrome && yarn run build:firefox && yarn run build:edge",
     "build:dev": "cross-env NODE_ENV=development yarn run build:chrome:dev && yarn run build:firefox:dev && yarn run build:edge:dev",
     "build:chrome": "cross-env NODE_ENV=production node ./chrome/build",
-    "build:chrome:crx": "cross-env NODE_ENV=production FEATURE_FLAG_TARGET=extension-fb node ./chrome/build --crx",
+    "build:chrome:fb": "cross-env NODE_ENV=production FEATURE_FLAG_TARGET=extension-fb node ./chrome/build --crx",
     "build:chrome:dev": "cross-env NODE_ENV=development node ./chrome/build",
     "build:firefox": "cross-env NODE_ENV=production node ./firefox/build",
     "build:firefox:dev": "cross-env NODE_ENV=development node ./firefox/build",
     "build:edge": "cross-env NODE_ENV=production node ./edge/build",
-    "build:edge:crx": "cross-env NODE_ENV=production node ./edge/build --crx",
+    "build:edge:fb": "cross-env NODE_ENV=production FEATURE_FLAG_TARGET=extension-fb node ./edge/build --crx",
     "build:edge:dev": "cross-env NODE_ENV=development node ./edge/build",
     "test:chrome": "node ./chrome/test",
     "test:firefox": "node ./firefox/test",