[PATCH 050/153] port pants sdist_builder over to use twitter.common.python
[PATCH 050/153] port pants sdist_builder over to use twitter.common.python

RB_ID=166358

(sapling split of 974bc36cf90064523c3c68ece5f92230119971fa)

VaybhavSharma/commons,pombredanne/commons,cevaris/commons,VaybhavSharma/commons,VaybhavSharma/commons,nkhuyu/commons,Yasumoto/commons,WCCCEDU/twitter-commons,WCCCEDU/twitter-commons,nkhuyu/commons,jsirois/commons,cevaris/commons,atollena/commons,abel-von/commons,Yasumoto/commons,jsirois/commons,jsirois/commons,pombredanne/commons,brutkin/commons,cevaris/commons,ericzundel/commons,Yasumoto/commons,atollena/commons,ericzundel/commons,pombredanne/commons,ericzundel/commons,ericzundel/commons,nkhuyu/commons,nkhuyu/commons,abel-von/commons,jsirois/commons,ericzundel/commons,atollena/commons,WCCCEDU/twitter-commons,abel-von/commons,VaybhavSharma/commons,WCCCEDU/twitter-commons,abel-von/commons,atollena/commons,abel-von/commons,brutkin/commons,WCCCEDU/twitter-commons,cevaris/commons,pombredanne/commons,Yasumoto/commons,Yasumoto/commons,brutkin/commons,cevaris/commons,pombredanne/commons,brutkin/commons,brutkin/commons,atollena/commons,nkhuyu/commons,VaybhavSharma/commons,jsirois/commons