glue: Add code for ARM64

This allows ARM64 to bootstrap for building of GCC.

Signed-off-by: Jaroslaw Pelczar <jarek@jpelczar.com>
Change-Id: Ia2ea34d1fc1a8e4d3c77a7ef05a32a8603a4fb51
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1851
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

system/glue: Add arm64 glue

Change-Id: I578c0ac89e5d40f086d0b66d5711f2b78c6087e1
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1840
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>