remove @_transparent from Array.init(arrayLiteral:)
It causes SwiftOnoneSupport to fail to compile, with error "swift:
/usr/local/google/home/marcrasi/swift-merge/swift/lib/SILOptimizer/Utils/Generics.cpp:1864:
swift::SILFunction
*swift::GenericFuncSpecializer::tryCreateSpecialization(): Assertion
`!SpecializedF->hasOwnership()' failed."
Since we don't depend on constexpr any more, this removal shouldn't
break anything.