make distcheck fails on xcursorgen

[quozl]

On Ubuntu 16.04, after 62cc314 by @ezequielpereira, the make distcheck step fails with;

config.status: creating config.h
config.status: executing depfiles commands
config.status: executing libtool commands
make[1]: Entering directory '/c/olpc/sugar-artwork/sugar-artwork-0.113/_build/sub'
make  all-recursive
make[2]: Entering directory '/c/olpc/sugar-artwork/sugar-artwork-0.113/_build/sub'
Making all in cursor
make[3]: Entering directory '/c/olpc/sugar-artwork/sugar-artwork-0.113/_build/sub/cursor'
Making all in sugar
make[4]: Entering directory '/c/olpc/sugar-artwork/sugar-artwork-0.113/_build/sub/cursor/sugar'
mkdir -p ../../cursor/sugar/cursors
xcursorgen hand_closed.in ../../cursor/sugar/cursors/hand_closed
Error reading config file!
Makefile:559: recipe for target 'sugar.stamp' failed
make[4]: *** [sugar.stamp] Error 1
make[4]: Leaving directory '/c/olpc/sugar-artwork/sugar-artwork-0.113/_build/sub/cursor/sugar'
Makefile:361: recipe for target 'all-recursive' failed
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory '/c/olpc/sugar-artwork/sugar-artwork-0.113/_build/sub/cursor'
Makefile:407: recipe for target 'all-recursive' failed
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory '/c/olpc/sugar-artwork/sugar-artwork-0.113/_build/sub'
Makefile:339: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/c/olpc/sugar-artwork/sugar-artwork-0.113/_build/sub'
Makefile:612: recipe for target 'distcheck' failed
make: *** [distcheck] Error 1

Workaround is to use make dist. Building the tar.xz on Ubuntu 18.04 works fine.

[quozl]

I've a fix for this.