headers: Add wscapi.h

Required for https://github.com/mozilla/gecko-dev/blob/f0b3dafb55f1e7904847f5dc889f131040789ba6/xpcom/base/nsSystemInfo.cpp#L34

Signed-off-by: Biswapriyo Nath <nathbappai@gmail.com>
Signed-off-by: LIU Hao <lh_mouse@126.com>
1 file changed