sys-fs/lvm2: Fix detection of systemd util directory

There usually exists a way to tell the configure script to use certain
path, so the script won't try to autodetect things. This is a case for
the systemd system unit directory, but apparently not for systemd util
directory. So for the system unit directory, we can forward the path
we received from systemd.eclass' `systemd_get_systemunitdir`, but for
the util directory, we need to hack the script with `sed`. The reason
for this is that autodetected directory will have the sysroot path
prepended twice. The systemd eclass has a workaround for this issue.

sdk_container/src/third_party/coreos-overlay/sys-fs/lvm2/README.md

@@ -13,3 +13,8 @@ systemd[1]: lvm2-activation-early.service: Failed with result 'start-limit-hit'.
 Set RemainAfterExit=yes as done for the other oneshot services to
 prevent the unit from running multiple times in a row and hitting the
 restart limit.
+
+
+
+We also patch the configure script to use the correct path for systemd
+util directory.

sdk_container/src/third_party/coreos-overlay/sys-fs/lvm2/lvm2-2.02.188-r2.ebuild

@@ -123,6 +123,13 @@ src_prepare() {
 		sed -i -e 's/^\(MAN7+=.*\) $(LVMTHINMAN) \(.*\)$/\1 \2/' man/Makefile.in || die
 	fi
 
+	# Flatcar: The configure script tries to detect the systemd
+	# util dir without providing a way for us to override it, so
+	# modify the script.
+	sed -i \
+	    -e "s#^\(systemdutildir=\).*#\1$(systemd_get_utildir)#" \
+	    configure{.ac,} || die
+
 	eautoreconf
 }