arm64: Preserve FPU registers in setjmp/longjmp and arch_context_swap.

Change-Id: If0ca2ecbfa45b663dab39d1e9cb2562f071c3b27
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5268
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: David Karoly <karolyd577@gmail.com>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

arm64: Implement setjmp/longjmp.

Change-Id: I9cd2d5de27a3b110b185c658e980428fe49392b0
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5267
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: David Karoly <karolyd577@gmail.com>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

arm64: Add more random scripts to get stuff to compile

Signed-off-by: Jaroslaw Pelczar <jarek@jpelczar.com>
Change-Id: Ie043af5b7471f626a1ffe100848151c832dcc439
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1853
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>