move INET tests to last, so we can see how much time they take

Oddly enough, moving this test to an earlier location, only had adverse
effects on the wallclock of spectest.  Grrr.  Wish I understood exactly what
is going on here.

t/spectest.data

@@ -579,7 +579,6 @@ S29-context/sleep.t
 S29-conversions/hash.t
 S29-conversions/ord_and_chr.t                              #icu
 S29-os/system.t
-S32-io/IO-Socket-INET.t  # out of order to give more wallclock in parallel tests
 S32-array/bool.t
 S32-array/create.t
 S32-array/delete.t
@@ -766,3 +765,4 @@ integration/variables-in-do.t
 integration/weird-errors.t
 rosettacode/greatest_element_of_a_list.t  
 rosettacode/sierpinski_triangle.t
+S32-io/IO-Socket-INET.t  # last to prevent load interference