systemd/xorg-server: upgrade to 21.1.15, drop DRI1 support (MR 6026)

https://gitlab.alpinelinux.org/alpine/aports/-/commit/a54d1c070c87699fc0c79987ac7035e5aac66174

https://gitlab.alpinelinux.org/alpine/aports/-/commit/7a031648bc577ead4710d9880779c61c1df9d93d

https://gitlab.alpinelinux.org/alpine/aports/-/commit/255f451f7f26a3a7f2dc44d2313a0b8490daa7d5

extra-repos/systemd/xorg-server/APKBUILD

 # Forked from Alpine to adjust dependencies for systemd
 
 pkgname=xorg-server
-pkgver=999921.1.14
-_pkgver=21.1.14
+pkgver=999921.1.15
+_pkgver=21.1.15
 pkgrel=0
 pkgdesc="X.Org X servers"
 url="https://www.x.org/wiki"
@@ -113,7 +113,7 @@ build() {
 		-Dhal=false \
 		-Dsystemd_logind=true \
 		-Ddpms=true \
-		-Ddri1=true \
+		-Ddri1=false \
 		-Ddri2=true \
 		-Ddri3=true \
 		. output
@@ -161,6 +161,6 @@ common() {
 }
 
 sha512sums="
-833d36ca4a409363dc021a50702bc29dbb32d074de319d6910a158b6e4d8f51a20c3b0de0486d9613d4e526fe4fd60ca306b3c9fcce7d014ca8cc10185afd973  xorg-server-21.1.14.tar.xz
+677bbec81ecdd1d14e1d289a00c40249988985ec636e5473b30c4f63bad03a6cc5f9168cea94969e1550370eee8863595bc9c064c3d218a96123afc7567bf363  xorg-server-21.1.15.tar.xz
 9ed9c731a7275a3821476eedd55f453027fdf9bcdfd8f259259a5d053c73e8b9298f048cbb009a4fb05230fb2a9ab7cc38a44d708973f09daa8570fae376236e  ms-rotate.patch
 "