expose more properties via the Fsc build task
expose more properties via the Fsc build task

(cherry picked from commit e339316c526ac254a21ce7b9b5cc4dd2353a7509)

Jand42/FSharp.Compiler.Service,forki/FSharp.Compiler.Service,alfonsogarciacaro/FSharp.Compiler.Service,fsharp/fsharp,fsharp/fsharp,sergey-tihon/FSharp.Compiler.Service,0x53A/FSharp.Compiler.Service,fsharp/fsharp,ncave/FSharp.Compiler.Service,cloudRoutine/FSharp.Compiler.Service,forki/FSharp.Compiler.Service,ncave/FSharp.Compiler.Service,dsyme/FSharp.Compiler.Service,sergey-tihon/FSharp.Compiler.Service,0x53A/FSharp.Compiler.Service,alfonsogarciacaro/FSharp.Compiler.Service,Jand42/FSharp.Compiler.Service,0x53A/FSharp.Compiler.Service,cloudRoutine/FSharp.Compiler.Service,sergey-tihon/FSharp.Compiler.Service,ncave/FSharp.Compiler.Service,alfonsogarciacaro/FSharp.Compiler.Service,Jand42/FSharp.Compiler.Service,cloudRoutine/FSharp.Compiler.Service,dsyme/FSharp.Compiler.Service,forki/FSharp.Compiler.Service,dsyme/FSharp.Compiler.Service