test_pathological_regressions takes > 1000ms to run on sparc64 machines

[keith-packard]

test_pathological_regressions ensures that the parsing code doesn't suddenly start taking way too much time to deal with badly broken input. The test requires that the parser take less than 1000ms to handle a specially constructed bit of input. On most machines, the test takes less than 100ms, well under the time limit. However, on Debian's sparc64 build servers, the test takes just over 1s, causing it to fail.

I've bumped the time limit to 10s in the debian package for now.