Upgrade default jarjar to 1.6.4. (#4271)
Upgrade default jarjar to 1.6.4. (#4271)

This picks up asm fixes from and closes
https://github.com/pantsbuild/jarjar/issues/26.
lahosken/pants,15Dkatz/pants,baroquebobcat/pants,foursquare/pants,fkorotkov/pants,15Dkatz/pants,wisechengyi/pants,fkorotkov/pants,wisechengyi/pants,15Dkatz/pants,benjyw/pants,pombredanne/pants,wisechengyi/pants,lahosken/pants,UnrememberMe/pants,tdyas/pants,twitter/pants,peiyuwang/pants,UnrememberMe/pants,wisechengyi/pants,pantsbuild/pants,twitter/pants,landism/pants,15Dkatz/pants,twitter/pants,pantsbuild/pants,peiyuwang/pants,tdyas/pants,peiyuwang/pants,lahosken/pants,baroquebobcat/pants,UnrememberMe/pants,pombredanne/pants,UnrememberMe/pants,benjyw/pants,benjyw/pants,foursquare/pants,jsirois/pants,foursquare/pants,twitter/pants,pantsbuild/pants,UnrememberMe/pants,foursquare/pants,lahosken/pants,peiyuwang/pants,baroquebobcat/pants,pantsbuild/pants,baroquebobcat/pants,pantsbuild/pants,peiyuwang/pants,jsirois/pants,baroquebobcat/pants,lahosken/pants,fkorotkov/pants,landism/pants,fkorotkov/pants,twitter/pants,lahosken/pants,foursquare/pants,tdyas/pants,tdyas/pants,pombredanne/pants,pombredanne/pants,baroquebobcat/pants,fkorotkov/pants,tdyas/pants,UnrememberMe/pants,landism/pants,benjyw/pants,peiyuwang/pants,landism/pants,benjyw/pants,UnrememberMe/pants,benjyw/pants,pombredanne/pants,wisechengyi/pants,tdyas/pants,15Dkatz/pants,wisechengyi/pants,fkorotkov/pants,foursquare/pants,baroquebobcat/pants,pombredanne/pants,peiyuwang/pants,UnrememberMe/pants,peiyuwang/pants,twitter/pants,pantsbuild/pants,15Dkatz/pants,baroquebobcat/pants,wisechengyi/pants,baroquebobcat/pants,15Dkatz/pants,15Dkatz/pants,lahosken/pants,foursquare/pants,fkorotkov/pants,UnrememberMe/pants,pombredanne/pants,landism/pants,foursquare/pants,wisechengyi/pants,pantsbuild/pants,foursquare/pants,twitter/pants,tdyas/pants,fkorotkov/pants,landism/pants,jsirois/pants,landism/pants,twitter/pants,benjyw/pants,twitter/pants,tdyas/pants,wisechengyi/pants,lahosken/pants,tdyas/pants,landism/pants