ACPICA: Add "Windows 2015" string to _OSI support.

ACPICA commit b293f602a67da478ae0bec129e68bd99787d9908

This change adds this string for Windows 10.

Link: https://github.com/acpica/acpica/commit/b293f602
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>