fixup! Add rand! implementation

Author: jpsamaroo

Diff for: src/array/random.jl

@@ -2,7 +2,7 @@ Random.rand!(dm::DArray{T}) where T = map!(_ -> rand(T), dm)
 Random.randn!(dm::DArray{T}) where T = map!(_ -> randn(T), dm)
 
 randfork(rng::R, n::Integer) where {R<:AbstractRNG} =
-    R(rand(copy(rng), Int) + n)
+    R(abs(rand(copy(rng), Int) + n))
 
 function Random.rand!(rng::AbstractRNG, A::DArray{T}) where T
     part_sz = prod(map(length, first(A.subdomains).indexes))