tests: fix spurious failure due to autom4te caching

* tests/ar-lib3.test: Remove stale autom4te.cache directory, to
prevent racy, spurious failures.

Reported by Jim Meyering in automake bug#10418.

diff --git a/tests/ar-lib3.test b/tests/ar-lib3.test
index 6bcf6c2..791322f 100755 (executable)
--- a/tests/ar-lib3.test
+++ b/tests/ar-lib3.test
@@ -39,6 +39,7 @@ cat >> configure.in << 'END'
 AM_PROG_AR
 END
 
+rm -rf autom4te*.cache
 $ACLOCAL
 $AUTOMAKE --add-missing