fixup: .travis.yml proper order of Pkg add
fixup: .travis.yml proper order of Pkg add

JuliaPackageMirrors/OpenCL.jl,tkelman/OpenCL.jl,tkelman/OpenCL.jl,yuyichao/OpenCL.jl,JuliaPackageMirrors/OpenCL.jl,yuyichao/OpenCL.jl