bindings: explicitly include activemsg.h for GASNetHSL
bindings: explicitly include activemsg.h for GASNetHSL

StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion