tests: fix spurious failure in a vala test

* tests/vala-mix2.test: Append to 'configure.ac' rather than to
'configure.in'.  Reported as part of automake bug#10866, and also
revealed by "make maintainer-check".

diff --git a/tests/vala-mix2.test b/tests/vala-mix2.test
index 88d2818888083273c48ada72e7cc95d962a8ec0d..4ac54447335dabd7f33daff7f4175f1a845cb8de 100755 (executable)
--- a/tests/vala-mix2.test
+++ b/tests/vala-mix2.test
@@ -22,7 +22,7 @@ required='valac cc c++ GNUmake'
 
 set -e
 
-cat >> configure.in <<'END'
+cat >> configure.ac <<'END'
 AC_PROG_CC
 AC_PROG_CXX
 AM_PROG_VALAC