[gimp] app: fix gimp-scratch linking in tests/

[Ell <ell src gnome org>]

commit 471fa632cdca3971dd39058c8df7df4cdc730dc2
Author: Ell <ell_se yahoo com>
Date:   Sat Dec 1 07:19:57 2018 -0500

    app: fix gimp-scratch linking in tests/

 app/tests/Makefile.am | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/app/tests/Makefile.am b/app/tests/Makefile.am
index f0d16c608a..4e0d5057b9 100644
--- a/app/tests/Makefile.am
+++ b/app/tests/Makefile.am
@@ -91,7 +91,8 @@ AM_LDFLAGS = \
        -Wl,-u,$(SYMPREFIX)gimp_layer_mode_is_legacy            \
        -Wl,-u,$(SYMPREFIX)gui_init                             \
        -Wl,-u,$(SYMPREFIX)gimp_tool_cursors_get_resource       \
-       -Wl,-u,$(SYMPREFIX)gimp_lebl_dialog
+       -Wl,-u,$(SYMPREFIX)gimp_lebl_dialog                     \
+       -Wl,-u,$(SYMPREFIX)gimp_scratch_block_new
 
 # Note that we have some duplicate entries here too to work around
 # circular dependencies and systems on the same architectural layer as