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

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

Change-Id: If1c787a2cd5a0e6c6cf1c7f94276e4be67edad5e