Faster subarray tests with ANY

[timholy]

There's no need to compile many of the test functions for the bazillion different subarray types, so let's use ANY in the tests.

Master:

julia> @time include("subarray.jl")
425.944279 seconds (221.28 M allocations: 8.740 GB, 1.24% gc time)

This PR:

julia> @time include("subarray.jl")
282.632151 seconds (146.17 M allocations: 5.896 GB, 2.29% gc time)

[timholy]

Hmm, OSX has now timed out twice. AFAICT this is happening after the main tests finish successfully, and the libgit2 tests are running. But the output for OSX seems to have changed recently, so I'm not sure I'm reading it correctly.

[JeffBezanson]

OSX is timing out a lot lately.

[timholy]

OK, so I'll assume this can't be making it worse and just merge this.

[mbauman]

OS X doesn't even run the subarray tests these days — it's just a minimal subset of tests to try to stay within the time limit. Thanks Tim.