T16608 tests fail on Darwin

--- driver/T16608/T16608_2.run/T16608_2.stdout.normalised	2019-06-21 23:15:43.000000000 -0700
+++ driver/T16608/T16608_2.run/T16608_2.run.stdout.normalised	2019-06-21 23:15:43.000000000 -0700
@@ -2,6 +2,4 @@
 [2 of 2] Compiling Main             ( T16608_2.hs, T16608_2.o )
 Linking T16608_2 ...
 41
-[1 of 2] Compiling MyInteger        ( MyInteger.hs, MyInteger.o )
-Linking T16608_2 ...
-42
+41

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