Commit a8a315ec196dd3a7953848e94d0e6218dd2115f5
2014-06-13T14:18:13
ignore config.cache/test-driver files [ Upstream commit c83f3333a34251275c38878e9667c904a485ac6d ] config.cache is generated when you run `./configure -C`. test-driver comes from newer autotools.