kvm-unit-tests: Gtests Framework and Example Tests

Test framework for KVM and the Linux kernel that enables standalone
tests to exercise host, guest, and nested guest functionality without
requiring a separate .flat file. The framework and tests are written
in C and assembly.

Signed-off-by: Ken Hofsass <hofsass@google.com>
Message-Id: <20180125184803.228086-1-hofsass@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>