libxl: support for "rtc_timeoffset" and "localtime"

libxl: support for "rtc_timeoffset" and "localtime"

Implement "rtc_timeoffset" and "localtime" options compatible as xm.

rtc_timeoffset is the offset between host time and guest time.
localtime means to specify whether the emulted RTC appears as UTC or is
offset by the host.

Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Lin Ming <mlin@ss.pku.edu.cn>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
---
 docs/man/xl.cfg.pod.5       |    8 ++++++++
 tools/libxl/libxl_create.c  |   11 +++++++++++
 tools/libxl/libxl_dom.c     |    3 +++
 tools/libxl/libxl_types.idl |    2 ++
 tools/libxl/xl_cmdimpl.c    |    5 +++++
 5 files changed, 29 insertions(+), 0 deletions(-)