Benchmark is not capturing malloc/free appropriately for linked test case

[hassila]

As outlined in https://forums.swift.org/t/benchmark-package-initial-release/60535/40
and using the repo at https://github.com/corymosiman12/swift-benchmark-testing - we don't properly capture the mallocs/frees, need to investigate whether it's due to failing to properly interpose jemalloc for Foundation, or if we simply miss some relevant jemalloc statistics that should be included.

[hassila]

Added minimised version of the tests into https://github.com/ordo-one/package-benchmark-samples

[hassila]

Actually, it was just a malformed test, it was only doing a single loop per test run and thus gave misleading statistics.

Adjusted the test code at e.g. https://github.com/ordo-one/package-benchmark-samples/blob/main/Benchmarks/MemoryOne/MemoryOne.swift

slightly and get expected results.