package/x11r7/xorgproto: new package

package/x11r7/xorgproto: new package

Quoting initial release notes:
https://lists.x.org/archives/xorg-announce/2018-February/002835.html

"This package combines the protocol headers, which were formerly
 scattered in individual packages. At this point none of them are
 changing rapidly enough to justify such fine granularity, particularly
 when what changes do occur tend to affect multiple extensions at once
 (Present and DRI3 for example). The individual protocols are still
 installed as separate pkg-config modules, and consumers should continue
 to use the per-protocol package version numbers."

Some xproto_* packages are host-packages so we need to add
host-autotools-package to this package as well.

Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>