Support cross compile with aarch64 platform, and use wayland default on embedded device

[iysheng]

Fxi cross compile on aarch64 platform, and use wayland default with embeded device. #181

compile log as:

[  2%] Generating color-management-v1-client-protocol.h
[  2%] Generating xdg-shell-client-protocol.h
[  4%] Generating fractional-scale-v1-client-protocol-code.h
[  4%] Generating fractional-scale-v1-client-protocol.h
[  6%] Generating idle-inhibit-unstable-v1-client-protocol-code.h
[  6%] Generating color-management-v1-client-protocol-code.h
[  7%] Generating idle-inhibit-unstable-v1-client-protocol.h
[  8%] Generating pointer-constraints-unstable-v1-client-protocol-code.h
[  9%] Generating pointer-constraints-unstable-v1-client-protocol.h
[ 10%] Generating relative-pointer-unstable-v1-client-protocol.h
[ 12%] Generating viewporter-client-protocol-code.h
[ 12%] Generating relative-pointer-unstable-v1-client-protocol-code.h
[ 13%] Generating wayland-client-protocol.h
[ 15%] Generating xdg-activation-v1-client-protocol-code.h
[ 15%] Generating viewporter-client-protocol.h
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