tests: Add backtrace_child_biarch_SOURCES to make distcheck happy.

Signed-off-by: Mark Wielaard <mjw@redhat.com>
diff --git a/tests/ChangeLog b/tests/ChangeLog
index 44f4ef6..0081981 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,5 +1,9 @@
 2013-12-10  Mark Wielaard  <mjw@redhat.com>
 
+	* Makefile.am (backtrace_child_biarch_SOURCES): New backtrace-child.c.
+
+2013-12-10  Mark Wielaard  <mjw@redhat.com>
+
 	* Makefile.am (valgrind_cmd): Remove --trace-children=yes.
 	* backtrace-subr.sh (check_native_core): Disable valgrind while
 	dumping core.