Error when I'm building an app with a separate builddir (e.g. for Continuous):

make[3]: Entering directory '/ostbuild/source/gnome-calendar/_build/data'
LC_ALL=C /usr/bin/intltool-merge  -x -u -c ../po/.intltool-merge-cache ../../po ../../data/appdata/org.gnome.Calendar.appdata.xml.in appdata/org.gnome.Calendar.appdata.xml
LC_ALL=C /usr/bin/intltool-merge  -d -u -c ../po/.intltool-merge-cache ../../po org.gnome.Calendar.desktop.in org.gnome.Calendar.desktop
(echo '[D-BUS Service]'; \
            echo 'Name=org.gnome.Calendar'; \
            echo 'Exec=/usr/bin/gnome-calendar --gapplication-service') > org.gnome.Calendar.service.tmp && \
            mv org.gnome.Calendar.service.tmp org.gnome.Calendar.service
glib-mkenums --comments '<!-- @comment@ -->' --fhead "<schemalist>" --vhead "  <@type@ id='org.gnome.calendar.@EnumName@'>" --vprod "    <value nick='@valuenick@' value='@valuenum@'/>" --vtail "  </@type@>" --ftail "</schemalist>" ../../src/gcal-utils.h > org.gnome.calendar.enums.xml.tmp && mv org.gnome.calendar.enums.xml.tmp org.gnome.calendar.enums.xml
LC_ALL=C /usr/bin/intltool-merge  -x -u -c ../po/.intltool-merge-cache ../../po ../../data/org.gnome.calendar.gschema.xml.in org.gnome.calendar.gschema.xml
Cannot open appdata/org.gnome.Calendar.appdata.xml: No such file or directory
Generating and caching the translation database
Merging translations into appdata/org.gnome.Calendar.appdata.xml.
Makefile:789: recipe for target 'appdata/org.gnome.Calendar.appdata.xml' failed
make[3]: *** [appdata/org.gnome.Calendar.appdata.xml] Error 2
make[3]: *** Waiting for unfinished jobs....


Attached patch fixes it