Compile RangeSse42.cpp with -msse4.2
Compile RangeSse42.cpp with -msse4.2

Summary:
Solves #509 by creating a libtool convenience library that's compiled with -msse4.2.
Closes https://github.com/facebook/folly/pull/510

Differential Revision: D4120400

Pulled By: yfeldblum

fbshipit-source-id: bf5d937dc37ef8707e755c89f1883d65b4d21b0f

rklabs/folly,floxard/folly,charsyam/folly,floxard/folly,Orvid/folly,facebook/folly,rklabs/folly,facebook/folly,Orvid/folly,facebook/folly,charsyam/folly,rklabs/folly,floxard/folly,facebook/folly,charsyam/folly,Orvid/folly,rklabs/folly,rklabs/folly,Orvid/folly,charsyam/folly,facebook/folly,floxard/folly,Orvid/folly,floxard/folly