Add dependency reads for vertex input data (#3000)
Add dependency reads for vertex input data (#3000)

This is the opportunity to take the indice and instance count in
consideration in draw call dependency.

This change fixes glDrawArraysIndirect() along the way, but
unfortunately it does not manage to handle glDrawElementsIndirect().
google/gapid,pmuetschard/gapid,google/gapid,google/agi,google/gapid,google/gapid,google/gapid,google/agi,pmuetschard/gapid,google/agi,google/gapid,pmuetschard/gapid,pmuetschard/gapid,pmuetschard/gapid,pmuetschard/gapid,google/agi,google/gapid,google/agi,google/agi,pmuetschard/gapid,google/agi,pmuetschard/gapid,google/agi,google/gapid