warning with Pkg.build on julia-0.5

[Peter Staab]

I was building IJulia which has a Nettle dependency and got the following warning:

WARNING: `@windows_only` is deprecated, use `@static if is_windows()` instead
 in depwarn(::String, ::Symbol) at ./deprecated.jl:64
 in @windows_only(::Any) at ./deprecated.jl:489
 in include_from_node1(::String) at ./loading.jl:426
 in evalfile(::String, ::Array{String,1}) at ./loading.jl:442 (repeats 2 times)
 in cd(::##2#4, ::String) at ./file.jl:59
 in (::##1#3)(::IOStream) at ./none:13
 in open(::##1#3, ::String, ::String) at ./iostream.jl:113
 in eval(::Module, ::Any) at ./boot.jl:234
 in process_options(::Base.JLOptions) at ./client.jl:239
 in _start() at ./client.jl:318
while loading /Users/XXXX/.julia/v0.5/Nettle/deps/build.jl, in expression starting on line 8

[Elliot Saba]

Should be fixed on master by b79fd3f, after the next tagged release that should go away for everyone. Thanks for reporting!