WIP: fxtec-pro1: new device (Fxtec Pro1)

Add Fxtec Pro1 (pro1) to pmaports. Currently only booting to Weston works, Xorg fbdev driver fails to initialize. It can work with hybris and xf86-video-hwcomposer, but necessary packages are not part of this MR yet.

device/device-fxtec-pro1/APKBUILD

+# Reference: <https://postmarketos.org/devicepkg>
+pkgname="device-fxtec-pro1"
+pkgdesc="Fxtec Pro1"
+pkgver=0.1
+pkgrel=0
+url="https://postmarketos.org"
+license="MIT"
+arch="aarch64"
+options="!check !archcheck"
+depends="postmarketos-base linux-fxtec-pro1 mkbootimg mesa-dri-swrast msm-fb-refresher"
+makedepends="devicepkg-dev"
+source="deviceinfo"
+
+build() {
+	devicepkg_build $startdir $pkgname
+}
+
+package() {
+	devicepkg_package $startdir $pkgname
+}
+
+
+sha512sums="f29ccbdebf15d772e56c2d11902868f42aed0d6fbfcea8ebd6337645f9bcb0918488615e2d0c28347217a4127d72e04f47b2a86dea382085b2f12ca4fc28a4e4  deviceinfo"