dracut: fix gzipped initramfs; wtf is --rsyncable?!!

- Do not depend on lz4 directly, just prefer lz4 if the bin is there.
- Fallback to gzip rather than bzip2 compression if lz4/xz are not available.
- Remove --rsyncable argument in gzipped initramfs, WTF IS IT??? IT'S NOT IN UPSTREAM.

srcpkgs/dracut/files/kernel-hook-postinst

@@ -15,8 +15,6 @@ if [ -x /bin/lz4 ]; then
 	args="--lz4"
 elif [ -x /bin/xz ]; then
 	args="--xz"
-elif [ -x /bin/bzip2 ]; then
-	args="--bzip2"
 fi
 dracut -q --force $args boot/initramfs-${VERSION}.img ${VERSION}
 exit $?

srcpkgs/dracut/template

@@ -1,10 +1,10 @@
 # Template file for 'dracut'
 pkgname=dracut
 version=040
-revision=1
+revision=2
 build_style=meta
 hostmakedepends="libxslt docbook-xsl asciidoc"
-depends="psmisc cpio lz4"
+depends="psmisc cpio"
 conf_files="/etc/dracut.conf"
 make_dirs="
 	/etc/dracut.conf.d 0755 root root
@@ -23,8 +23,9 @@ do_build() {
 do_install() {
 	# fix path to busybox.
 	sed -i "s|/sbin/busybox|/bin/busybox|g" modules.d/05busybox/module-setup.sh
-
 	make DESTDIR=${DESTDIR} sysconfdir=/etc systemdsystemunitdir=/usr/lib/systemd/system install
+	# Remove --rsyncable argument for gzip WTF??
+	sed -i 's,--rsyncable,,g' ${DESTDIR}/usr/bin/dracut
 
 	# kernel hooks.
 	vinstall ${FILESDIR}/kernel-hook-postinst 755 etc/kernel.d/post-install 10-dracut