Summary:
A tiny PR to add support for launching IDEA editors with the cursor at the correct line. The argument syntax is the same as sublime.
The base names `wstorm`, `idea` and `appcode` are the default names when CLI launchers are created through 'Tools'->'Create Command-Line launcher' in the respective editor's gui.
Tested through a fork of RN on Webstorm, IntelliJ and AppCode for OSX and by manual invocation from CLI on IntelliJ for windows.
Closes https://github.com/facebook/react-native/pull/9042
Differential Revision: D3627680
fbshipit-source-id: dfb0db92f9ca8b464471c3dc9e92196d87d2e244