fixed osname reference in ast optimizer.js (ALOY-557)
fixed osname reference in ast optimizer.js (ALOY-557)

jppope/alloy,4talesa/alloy,brentonhouse/brentonhouse.alloy,WY08271/alloy,xavierlacot/alloy,mobilehero/adamantium,FokkeZB/alloy,FokkeZB/alloy,bhatfield/alloy,NadsonFernando/alloy,mobilehero/adamantium,jvkops/alloy,jvkops/alloy,jppope/alloy,NadsonFernando/alloy,FokkeZB/alloy,bhatfield/alloy,brentonhouse/brentonhouse.alloy,indera/alloy,jvkops/alloy,indera/alloy,indera/alloy,xavierlacot/alloy,mobilehero/adamantium,bhatfield/alloy,jppope/alloy,4talesa/alloy,WY08271/alloy,brentonhouse/brentonhouse.alloy,4talesa/alloy,xavierlacot/alloy,WY08271/alloy,NadsonFernando/alloy