main/libdrm: add docs

main/libdrm/APKBUILD

@@ -1,7 +1,7 @@
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=libdrm
 pkgver=2.4.89
-pkgrel=1
+pkgrel=2
 pkgdesc="Userspace interface to kernel DRM services"
 url="https://dri.freedesktop.org/"
 arch="all"
@@ -10,9 +10,9 @@ options="!check"
 license="MIT"
 depends=""
 depends_dev="linux-headers"
-makedepends="$depends_dev libpthread-stubs eudev-dev libpciaccess-dev"
+makedepends="$depends_dev libpthread-stubs eudev-dev libpciaccess-dev xmlto"
 checkdepends="cunit-dev bash"
-subpackages="$pkgname-dev"
+subpackages="$pkgname-dev $pkgname-doc"
 source="https://dri.freedesktop.org/$pkgname/$pkgname-$pkgver.tar.bz2
 	ioctl.patch
 	fix-symbol-checks.patch
@@ -31,7 +31,6 @@ build() {
 		--localstatedir=/var \
 		--enable-freedreno \
 		--enable-udev \
-		--disable-manpages \
 		--disable-valgrind
 	make
 }