There are two changes here:
1. The serial_console config option group help text is
updated to point out that hyper-v also supports serial
console access. This is based on virt drivers that
implement the 'get_serial_console' method.
2. The hypervisor feature matrix is updated to point out
that the vmware driver does not support getting serial
console output. This is based on virt drivers that
implement the 'get_console_output' method.
Closes-Bug: #1632135
Change-Id: Ibf7f865e2b768e5ea3d7a7ec7cbf77bd8997c50f
a5bd35f899