Call rollup instead of yarn rollup as part of publish-local script. (tensorflow#1618)

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Author: annxingyuan

package.json

@@ -45,7 +45,7 @@
     "build": "tsc",
     "build-npm": "./scripts/build-npm.sh",
     "link-local": "yalc link",
-    "publish-local": "rimraf dist/ && yarn build && yarn rollup -c && yalc push",
+    "publish-local": "rimraf dist/ && yarn build && rollup -c && yalc push",
     "lint": "tslint -p . -t verbose",
     "coverage": "KARMA_COVERAGE=1 karma start --browsers='Chrome' --singleRun",
     "test": "karma start",