Enable bug workaround also for MSVC 2017.4
Enable bug workaround also for MSVC 2017.4

Summary:
Workaround a bug in template instantiation in MSVC 2017 U3/4 with /permissive-

https://developercommunity.visualstudio.com/content/problem/81223/incorrect-error-c5037-with-permissive.html

/cc Orvid
Closes https://github.com/facebook/folly/pull/691

Reviewed By: yfeldblum

Differential Revision: D6085652

Pulled By: Orvid

fbshipit-source-id: f068dc3f8e474163815fc497b05410fe76834a52

Orvid/folly,Orvid/folly,rklabs/folly,facebook/folly,facebook/folly,Orvid/folly,rklabs/folly,Orvid/folly,rklabs/folly,facebook/folly,Orvid/folly,rklabs/folly,facebook/folly,rklabs/folly,facebook/folly