Faster `Array[T](t)` for @specialialized T.
Faster `Array[T](t)` for @specialialized T.

Avoid boxing the elements in favour of bulk clone of the varargs
array into the result array, when the runtime type of the
class-tag-generated result array is the same as the varargs array.

lrytz/scala,scala/scala,scala/scala,scala/scala,lrytz/scala,scala/scala,lrytz/scala,lrytz/scala,lrytz/scala,scala/scala,scala/scala,lrytz/scala