Update after 'test-driver' in Automake changed

[Bruno Haible]

This patch avoids a notice when Automake 1.16.3 is used:

patching file build-aux/test-driver
Hunk #1 succeeded at 106 (offset 2 lines).


2020-11-21  Bruno Haible  <bruno@clisp.org>

        Update after 'test-driver' in Automake changed.
        * build-aux/test-driver.diff: Rebase.

diff --git a/build-aux/test-driver.diff b/build-aux/test-driver.diff
index 2daab79..b81e5a1 100644
--- a/build-aux/test-driver.diff
+++ b/build-aux/test-driver.diff
@@ -1,6 +1,6 @@
 --- test-driver.bak    2019-01-23 03:22:06.672283432 +0100
 +++ test-driver        2019-01-23 04:23:21.201060757 +0100
-@@ -104,7 +104,10 @@
+@@ -106,7 +106,10 @@
  trap "st=143; $do_exit" 15
 
  # Test script is run here.