Reorder stuff in scala_compile.
Reorder stuff in scala_compile.

Avoids a full recompile after missing deps are detected.

Auditors: pl

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