Workaround for test/AutoDiff/array.swift.
`-Xfrontend -enable-ownership-stripping-after-serialization` for swiftCore
causes test/AutoDiff/array.swift to crash (regarding calls to
`Array.recursivelyAllKeyPaths`).
SR-11336 seems related and is reproducible from master.
Disabling flag for swiftCore (and all other standard library modules) until
SR-11336 is resolved.
Temporarily disable affected test SILOptimizer/pound_assert.swift.
TF-799 tracks re-enabling the test.
