share.cfg.guest-os.Windows.cfg : Modify the regex of e1000 Description

This patch modify the regex of e1000 Description for windowns guest
nic_hotplug test.

Signed-off-by: Yunping Zheng <yunzheng@redhat.com>
Merge pull request #1158 from humanux/e1000_regex

share.cfg.guest-os.Windows.cfg : Modify the regex of e1000 Description