Cirrus CI: Work around strange FreeBSD std.experimental.allocator unittest regression

[kinke]

No description provided.

[MoonlightSentinel]

What fails on FreeBSD?

[kinke]

****** FAIL release64 std.experimental.allocator
core.exception.AssertError@std/experimental/allocator/package.d(3738): Assertion failure

Twice in a row for #3678 (I thought it was just spurious when seeing it the first time). Only with enabled optimizations and shared druntime/Phobos, and by the looks of it, not related to any recent changes. But it was green earlier today with master, and green before today's additions to #3678, which included these frontend changes.

[MoonlightSentinel]

Note that the failing test was disabled for a long time due to a spurious __EOF__, see dlang/phobos#7778.
Did master already include this PR?.

[kinke]

Wow, wtf is/was that __EOF__?! Dude...

Still fails without this last-minute frontend diff, so something else added today in #3678 must have brought this issue to light. The __EOF__ was already removed in #3678 before today (Phobos wasn't touched today at all).

Edit: Okay, a FreeBSD image/packages change could be another reason, as the last successful #3678 run was some days ago, and the test is disabled for master which ran today successfully before merging 2.096.