zfs-utils*/: add explicit --enable-systemd

It should already be installed, but makechrootpkg might non-conformantly
not have it installed leading to broken system probing. Short-circuit
the check entirely.

Also clean up some autotools path args that were already the default.

.SRCINFO

@@ -23,4 +23,3 @@ pkgbase = zfs-utils
 	b2sums = 491a7f20b0c6b4ce4fcedab617b2d7a4f2a01f1bc8f1ae57efde2fb22c2ab09a1107a8f4877b95c27576fe4216d01f181936787f51ce532bb13c5806badf7519
 
 pkgname = zfs-utils
-

PKGBUILD

@@ -39,13 +39,11 @@ build() {
                 --sysconfdir=/etc \
                 --sbindir=/usr/bin \
                 --with-mounthelperdir=/usr/bin \
-                --libdir=/usr/lib \
-                --datadir=/usr/share \
-                --includedir=/usr/include \
                 --with-udevdir=/usr/lib/udev \
                 --libexecdir=/usr/lib/zfs \
                 --with-python="$PWD/python3-fake" \
                 --enable-pyzfs=no \
+                --enable-systemd \
                 --with-config=user
     make
 }