[gimp] Issue #8552: Failed to build using gimp-2.99.12-autotools.tar.bz2 tarball.

[Jehan <jehanp src gnome org>]

commit 9ff1358e0b2331482ac0748544f8cb49f23996ba
Author: Jehan <jehan girinstud io>
Date:   Wed Aug 31 00:46:29 2022 +0200

    Issue #8552: Failed to build using gimp-2.99.12-autotools.tar.bz2 tarball.

 tools/Makefile.am | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/tools/Makefile.am b/tools/Makefile.am
index da1fd9a8e5..f5cc4661fb 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -109,6 +109,7 @@ AM_LDFLAGS = \
 EXTRA_DIST = \
        colorsvg2png.c                          \
        defcheck.py                             \
+       generate-welcome-dialog-data.py         \
        gimp-mkenums                            \
        gimppath2svg.py                         \
        mnemonic-clashes                        \