Fix the build using newest autoconf.

https://bugzilla.gnome.org/show_bug.cgi?id=679004
(cherry picked from commit aebd85d33c1cdbfb75c10436a6a49d76738ef7eb)

The source code is the SVG file; it's been copied from
commit a10dc2f2.

https://bugzilla.gnome.org/show_bug.cgi?id=657280
(cherry picked from commit 52cf7de3)

Signed-off-by: Fran Diéguez <fran.dieguez@mabishu.com>

Jim Sublette authored Nov 24, 2011 and Christian Persch committed Nov 24, 2011

$expt was removed from guile.

https://bugzilla.gnome.org/show_bug.cgi?id=649730
(cherry picked from commit d8e0eb22)

Martin Pitt authored Nov 14, 2011 and Christian Persch committed Nov 15, 2011

Use g_set_error_literal() for setting the error message to the stack trace, as
this might contain format string macros. Spotted by building with
-Werror=format-security:

game.c: In function 'game_scm_pre_unwind_handler':
game.c:425:24: error: format not a string literal and no format arguments [-Werror=format-security]
(cherry picked from commit 3e6a3c97)

Copied over from gnome-games.