Don't actually run the prerelease postinstall in node's postinstall
Don't actually run the prerelease postinstall in node's postinstall

Summary: I found that node's postinstall script environment adds weird
things in the path and so compilation performed there isn't reliable.
This runs the "postinstall" part of prerelease independently.

Test Plan:

Reviewers:

CC:

reasonml/reason-cli