target-i386/kvm: Hyper-V HV_X64_MSR_VP_RUNTIME support

target-i386/kvm: Hyper-V HV_X64_MSR_VP_RUNTIME support

HV_X64_MSR_VP_RUNTIME msr used by guest to get
"the time the virtual processor consumes running guest code,
and the time the associated logical processor spends running
hypervisor code on behalf of that guest."

Calculation of that time is performed by task_cputime_adjusted()
for vcpu task by KVM side.

Signed-off-by: Andrey Smetanin <[email protected]>
Signed-off-by: Denis V. Lunev <[email protected]>
CC: Paolo Bonzini <[email protected]>
CC: Richard Henderson <[email protected]>
CC: Eduardo Habkost <[email protected]>
CC: "Andreas Färber" <[email protected]>
CC: Marcelo Tosatti <[email protected]>
Message-Id: <1442397584[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>