changed js backend to look for includes also in getIdrisLibDir
changed js backend to look for includes also in getIdrisLibDir

Heather/Idris-dev,mpkh/Idris-dev,uuhan/Idris-dev,markuspf/Idris-dev,kojiromike/Idris-dev,Heather/Idris-dev,uuhan/Idris-dev,kojiromike/Idris-dev,mpkh/Idris-dev,mpkh/Idris-dev,kojiromike/Idris-dev,Heather/Idris-dev,uuhan/Idris-dev,uuhan/Idris-dev,markuspf/Idris-dev,kojiromike/Idris-dev,markuspf/Idris-dev,mpkh/Idris-dev,Heather/Idris-dev,Heather/Idris-dev,kojiromike/Idris-dev,Heather/Idris-dev,kojiromike/Idris-dev,markuspf/Idris-dev,uuhan/Idris-dev,uuhan/Idris-dev,markuspf/Idris-dev,mpkh/Idris-dev,markuspf/Idris-dev,markuspf/Idris-dev,uuhan/Idris-dev,mpkh/Idris-dev