device-qemu-*: set a default resolution for X11

Commit message:

Qemu by default starts a GTK window in VGA resolution 640x480. The content adapts to this resolution, thus X11 shows up in resolution 640x480 as well.

This resolution causes some handling issues. In Xfce4 the shutdown button of the menu isn't reachable. Even worse in MATE, where the "Apply" button for changing the resolution is out of the screen, making it difficult to change the resolution.

The default resolution for X11 can be set by a config file. The Qemu GTK window resolution remains independently at default 640x480. Setting the X11 resolution to default 800x600 mitigates the issue: Most of the screen content becomes accessible while font size and button sizes are still large enough. From this point the user can adjust the resolutions of the Qemu GTK window and X11 content as desired.

---

I was thinking about adding this to subpackage postmarketos-base-ui-x11 but I'm not fully sure if there are other devices or use cases that have screens with X11 identifier "Virtual-1". Therefore I chose the more safe way to add this X11 config file to the qemu devices only.

device/main/device-qemu-aarch64/APKBUILD

@@ -2,8 +2,8 @@
 # Maintainer: Minecrell <minecrell@minecrell.net>
 # Co-Maintainer: Oliver Smith <ollieparanoid@postmarketos.org>
 pkgname=device-qemu-aarch64
-pkgver=5
-pkgrel=1
+pkgver=6
+pkgrel=0
 pkgdesc="Simulated device in QEMU (aarch64)"
 url="https://postmarketos.org"
 arch="aarch64"
@@ -16,12 +16,14 @@ subpackages="
 	$pkgname-kernel-edge:kernel_edge
 	$pkgname-mce
 	$pkgname-sway
+	$pkgname-x11
 	"
 
 source="
 	deviceinfo
 	modules-initfs
 	mce-display-blanking.conf
+	resolution-qemu-X11.conf
 	"
 options="!check !archcheck"
 
@@ -46,6 +48,12 @@ sway() {
 	mkdir "$subpkgdir"
 }
 
+x11() {
+	install_if="$pkgname=$pkgver-r$pkgrel xorg-server"
+	install -Dm644 "$srcdir"/resolution-qemu-X11.conf \
+		"$subpkgdir"/etc/X11/xorg.conf.d/10-resolution-qemu-X11.conf
+}
+
 kernel_virt() {
 	pkgdesc="Alpine Virt kernel (minimal, no audio)"
 	depends="linux-virt"
@@ -68,4 +76,5 @@ sha512sums="
 90527c2be00f97172f8e9b7508aba706c62e9067c50c93cfa69fbe5940462e9a165f35b9c8dd0efe2b690a839c6069b26d0c8706b7c4114219ef3004ea3dda3e  deviceinfo
 8129439ec53e76e714b2d3dac97bbe702822d6f6642ea6b631aa26001fec85ca310fbe9eeb04c2bd849145a1137b7934c21b704524f3a98b96b7c6f71c2ca992  modules-initfs
 99d32eed6c5cda59e91516e982c5bd5165ff718133e2411a0dbba04e2057d1dfad49a75e5cc67140d0e0adcbe1383671bd2892335929b782a5b19f5472e635ad  mce-display-blanking.conf
+bfff3ebf11abb43d8ea45e778c19554b1bc8ef9e694d8160daaac0ef906b4d8eda772e5f984033cce52ebddfbbe76e5340c6805e68f967994a3240c1e10c8b5b  resolution-qemu-X11.conf
 "