Generate yarn.lock file
Generate yarn.lock file

Summary: In order to build WDA with BUCK and without node_modules commited we need to generate yarn.lock file

Reviewed By: bestander

Differential Revision: D4213299

fbshipit-source-id: 4d44948f7031f9dfda61d9fc75884a7cb30c17ae

b1ueshad0w/WebDriverAgent,b1ueshad0w/WebDriverAgent,PiranhaTeam/WebDriverAgent,calabash/WebDriverAgent,qa-dev/WebDriverAgent,PiranhaTeam/WebDriverAgent,drptbl/WebDriverAgent,zenzhu/WebDriverAgent,riccoyu/WebDriverAgent,riccoyu/WebDriverAgent,ymin/WebDriverAgent,PiranhaTeam/WebDriverAgent,drptbl/WebDriverAgent,b1ueshad0w/WebDriverAgent,b1ueshad0w/WebDriverAgent,ymin/WebDriverAgent,Gogle/WebDriverAgent,qa-dev/WebDriverAgent,riccoyu/WebDriverAgent,PiranhaTeam/WebDriverAgent,qa-dev/WebDriverAgent,PiranhaTeam/WebDriverAgent,Gogle/WebDriverAgent,Gogle/WebDriverAgent,calabash/WebDriverAgent,qa-dev/WebDriverAgent,zenzhu/WebDriverAgent,ymin/WebDriverAgent,drptbl/WebDriverAgent,calabash/WebDriverAgent,ymin/WebDriverAgent,Gogle/WebDriverAgent,riccoyu/WebDriverAgent,zenzhu/WebDriverAgent