Fixup the aarch64-cpus.c test for swift-5.0 branch
Fixup the aarch64-cpus.c test for swift-5.0 branch

On master, +aes is passed by the driver after r343758,
but on the release branch that's not the case. This commit
adjusts the test to check for "+crypto" feature instead.

rdar://46817924

apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang