hopefully fix assertion failure in random test

[tkelman]

introduced by cb52f15
jl_ios_get_nbyte_int does not support int128 right now

[tkelman]

backport for second (and third) commit, if enabling assertions works on appveyor

[JeffBezanson]

I'm about to push a test for this that doesn't rely on assertions.

[JeffBezanson]

Here it is, in case you want to add it here:

# make sure reading 128-bit ints from RandomDevice works
let a = [rand(RandomDevice(), UInt128) for i=1:10]
    @test reduce(|, a)>>>64 != 0
end

I'll hold off on pushing.

[tkelman]

thanks, pushed that here. looks green on the travis linux branch build. merge if green everywhere else?