fix build with hermes on windows

[B27]

Summary

On the Windows platform, with hermes-engine enabled, the assembly crashes with an error:

The problem lies in calling hermes command without the leading arguments "cmd", "/c" (react.gradle, line: 152 )

Changelog

[General] [Fixed] - Added a platform check and running commandLine with the corresponding arguments

Test Plan

Under Windows, enable hermes-engine in build.gradle and run the gradlew assembleRelease or gradlew bundleRelease command
Also check assembly on other available platforms

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[zenz]

this was commited, but don't know why it is not in the release: ee82182

[cpojer]

Thank you!

[facebook-github-bot]

@cpojer is landing this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[react-native-bot]

This pull request was successfully merged by @B27 in 81a6b6e.

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