Update acloud linux from aosp-master aosp_cf_x86_phone-userdebug 5227608

Make symlink of linux-x86 to darwin-x86, looks like they can be shared
for the time being until I can find a reliable mac builder.

Bug: 113557161
Test: acloud setup|create|list|reconnect|delete
Change-Id: Iafec3015642eb66d7a7027c1a47f9f16c4a32ad1