Missing test coverage for -Mallocatable=95 behaviour

[Bryan Chan]

From #1288 (comment):

In light of @kiranchandramohan's comment, perhaps we should have another test to make sure that -Mallocatable=95 still works. 😄 There are a number of tests which exercise -Mallocatable=03 but none that uses -Mallocatable=95.

The default is -Mallocatable=03, and we have no test at all that specifies -Mallocatable=95. The functionality may be broken and we wouldn't know.