arm64: Add initial stubs for stackframe and time

Signed-off-by: Jaroslaw Pelczar <jarek@jpelczar.com>
Change-Id: Ie17279a9c17ab8bb7a812fe83d1b668853f96d5c
Reviewed-on: https://review.haiku-os.org/c/

arm64: Add initial stubs for stackframe and time

Signed-off-by: Jaroslaw Pelczar <jarek@jpelczar.com>
Change-Id: Ie17279a9c17ab8bb7a812fe83d1b668853f96d5c
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1858
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

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