Update .gitignore

New symbolic link:
test-driver -> /usr/share/automake-1.13/test-driver

Author:    Aurimas Fišeras <aurimas@members.fsf.org>

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23037 57a11ea4-9604-0410-9ed3-97b8803252fd

.gitignore

@@ -240,6 +240,7 @@ src/test-core/test_stuff.py
 src/test-core/unittest_support.py
 stamp-h1
 swig-*.c
+test-driver
 translog.*.log
 CMakeLists.txt.user
 gnucash.config