do: Automatically run `do build generate` before first build. (#235)
do: Automatically run `do build generate` before first build. (#235)

Change-Id: Id45476795f19e1c5e1e6666c587b6842457bc846
pmuetschard/gapid,pmuetschard/gapid,pmuetschard/gapid,ben-clayton/gapid,google/agi,baldwinn860/gapid,ek9852/gapid,google/gapid,baldwinn860/gapid,google/gapid,baldwinn860/gapid,Qining/gapid,google/agi,ben-clayton/gapid,ben-clayton/gapid,eternity74/gapid,google/agi,google/agi,Qining/gapid,google/gapid,dsrbecky/gapid,pmuetschard/gapid,dsrbecky/gapid,ben-clayton/gapid,eternity74/gapid,ek9852/gapid,google/agi,Qining/gapid,google/gapid,dsrbecky/gapid,eternity74/gapid,dsrbecky/gapid,ek9852/gapid,ek9852/gapid,pmuetschard/gapid,eternity74/gapid,eternity74/gapid,ek9852/gapid,google/gapid,ek9852/gapid,baldwinn860/gapid,Qining/gapid,Qining/gapid,pmuetschard/gapid,ben-clayton/gapid,ben-clayton/gapid,ek9852/gapid,ek9852/gapid,eternity74/gapid,dsrbecky/gapid,ben-clayton/gapid,Qining/gapid,dsrbecky/gapid,ben-clayton/gapid,google/agi,Qining/gapid,google/gapid,pmuetschard/gapid,baldwinn860/gapid,dsrbecky/gapid,google/agi,google/agi,dsrbecky/gapid,eternity74/gapid,Qining/gapid,baldwinn860/gapid,google/gapid,google/gapid,baldwinn860/gapid,pmuetschard/gapid,baldwinn860/gapid