Makefile: clean qemu-iotests output

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/configure b/configure
index d7e0926..9885cfe 100755
--- a/configure
+++ b/configure
@@ -1559,7 +1559,7 @@
 LINKS="$LINKS pc-bios/vof/Makefile"
 LINKS="$LINKS .gdbinit scripts" # scripts needed by relative path in .gdbinit
 LINKS="$LINKS tests/avocado tests/data"
-LINKS="$LINKS tests/qemu-iotests/check"
+LINKS="$LINKS tests/qemu-iotests/check tests/qemu-iotests/Makefile"
 LINKS="$LINKS python"
 LINKS="$LINKS contrib/plugins/Makefile "
 for f in $LINKS ; do