colord: Do not install systemd service unit [1]

> --with-systemdsystemunitdir=no: Disables attempting to build with
> systemd libraries.

[1] http://www.linuxfromscratch.org/blfs/view/8.1/general/colord.html

colord.be0

@@ -33,7 +33,8 @@ mee_configure() {
         --disable-static \
         --disable-systemd-login \
         --disable-udev \
-        --with-daemon-user=colord
+        --with-daemon-user=colord \
+        --without-systemdsystemunitdir
 }
 
 #mee_build() {