New ZFS packages

Update ZFS to 0.8.3, correct configure errors, and backport time_t removal patches.

Successfully loads and imports an existing v0.7.13 pool on x86_64.

experimental/zfs/APKBUILD

+# Contributor: Kiyoshi Aman <kiyoshi.aman+adelie@gmail.com>
+# Maintainer: Kiyoshi Aman <kiyoshi.aman+adelie@gmail.com>
+# keep these in sync with kernel version
+_kflavour=""
+_kver="5.4.5-mc0"
+_kver2="$_kver-easy"
+pkgname="zfs-$_kver"
+pkgver=0.8.3
+pkgrel=0
+pkgdesc="Linux support for the ZFS filesystem"
+url="https://open-zfs.org"
+arch="all"
+license="CDDL"
+depends="easy-kernel$_kflavour-modules-$_kver zfs-utils"
+makedepends="eudev-dev libtirpc-dev linux-headers openssl-dev zlib-dev
+	easy-kernel$_kflavour-src-$_kver autoconf automake libtool"
+install=""
+subpackages="$pkgname-dev"
+source="https://github.com/zfsonlinux/zfs/releases/download/zfs-$pkgver/zfs-$pkgver.tar.gz
+	fix-autoconf-redirection-for-dash.patch
+	Linux-5.6-compat-time_t-2c3a83701dd1.patch
+	Linux-5.6-compat-timestamp_truncate-795699a6cc28.patch
+	Linux-5.6-compat-ktime_get_raw_ts64-ff5587d65137.patch"
+builddir="$srcdir/zfs-$pkgver"
+
+prepare() {
+	default_prepare
+	update_config_sub
+	./autogen.sh
+}
+
+build() {
+	./configure \
+		--build=$CBUILD \
+		--host=$CHOST \
+		--prefix=/usr \
+		--sysconfdir=/etc \
+		--mandir=/usr/share/man \
+		--localstatedir=/var \
+		--with-linux=/usr/src/linux-$_kver \
+		--with-spec=generic \
+		--with-config=kernel
+	make
+}
+
+check() {
+	make check
+}
+
+package() {
+	make DESTDIR="$pkgdir" install
+}
+
+dev() {
+	default_dev
+	mv "$pkgdir/usr/src/spl-$pkgver" "$subpkgdir/usr/src"
+	cd "$pkgdir/usr/src/zfs-$pkgver"
+	mv zfs.release.in zfs_config.h.in "$subpkgdir/usr/src/zfs-$pkgver"
+	cd "$pkgdir/usr/src/zfs-$pkgver/$_kver2"
+	mv Module.symvers zfs.release spl.release "$subpkgdir/usr/src/zfs-$pkgver/$_kver2"
+	rm -r "$pkgdir/usr/src"
+}
+
+sha512sums="aded632e6b04180560d4f2ff283260016e883dadae4e7fda9070b7113dee948099cb7a7b183f1c8139654389a2610fb9cc6f997acdc846040e605125cf016010 zfs-0.8.3.tar.gz
+47dc563fc1daa4c67096d2316ed2cea6aeaf4ca9e0daa41f2036a4ff3dcb542c88534ac25033a23e8fa97a9b82e56a8933f9fa56bae8a1fa07c1b15eb18f68f8  fix-autoconf-redirection-for-dash.patch
+a74bb30ef2e5f28fdc7b0cfe915f2841762ec8f6cd2368d2e4ba8627443e8e0754011a88b743e27519d191464e35e6c923510451f2a86d7e1a4ad3c5b737015f  Linux-5.6-compat-time_t-2c3a83701dd1.patch
+a791406265a6e1501e743b6f13764736439a14a9dfc1feaabc5fc82e27de1b2adf56b566c162fc42313f311fbf76c3213f7c2c05a518de36f96887e3d462e94a  Linux-5.6-compat-timestamp_truncate-795699a6cc28.patch
+9c78793a5840bc5fb5bb44a210124c1c8f09ce0ddfe88b91be8dbde5465763912308b89cd87300fd05b898076366528612c34a9c2f834d3b6573aa68eb442ec3  Linux-5.6-compat-ktime_get_raw_ts64-ff5587d65137.patch"
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