Fix attribute location mapping for glLinkProgram
Fix attribute location mapping for glLinkProgram

gl_ prefix is not allowed and we should skip those entries.

Qining/gapid,pmuetschard/gapid,dsrbecky/gapid,baldwinn860/gapid,google/gapid,google/agi,dsrbecky/gapid,baldwinn860/gapid,google/agi,ek9852/gapid,google/agi,pmuetschard/gapid,baldwinn860/gapid,ek9852/gapid,google/agi,google/gapid,Qining/gapid,dsrbecky/gapid,baldwinn860/gapid,baldwinn860/gapid,ek9852/gapid,ek9852/gapid,ek9852/gapid,dsrbecky/gapid,google/gapid,Qining/gapid,pmuetschard/gapid,baldwinn860/gapid,Qining/gapid,dsrbecky/gapid,pmuetschard/gapid,baldwinn860/gapid,google/agi,dsrbecky/gapid,google/gapid,dsrbecky/gapid,google/gapid,Qining/gapid,Qining/gapid,pmuetschard/gapid,pmuetschard/gapid,baldwinn860/gapid,google/agi,ek9852/gapid,Qining/gapid,google/gapid,Qining/gapid,ek9852/gapid,google/gapid,ek9852/gapid,google/gapid,google/agi,pmuetschard/gapid,pmuetschard/gapid,dsrbecky/gapid,google/agi