[scudo] Skip AllocAfterFork test on machines with low max_map_count am: f8c50b7eea am: 3781725681 am: 019d908c73 am: ce75a051f8 am: bf08142ac3

Original change: https://android-review.googlesource.com/c/platform/external/scudo/+/1852507

Change-Id: Id10f920b226a501b37112e8328ac8a8050bcfee5