Look for tags along the master branch checkout out Zstd
Look for tags along the master branch checkout out Zstd

Summary:
There is no guarantee that the default branch in git is 'master'; so
    unless specified we checkout a tag along the 'dev' branch, which is not
    intended as it is the master branch that tracks releases for Zstd.

Reviewed By: jstrizich

Differential Revision: D8297843

fbshipit-source-id: 8497dc75c399ae7c86e27b28fdb73898ef4b1a4e

facebook/wangle,facebook/wangle,facebook/wangle