I was checking on https://bugs.python.org/issue30345 and https://bugs.python.org/issue33914. I looked into Travis and VSTS builds for test_gdb. Though python is built with `--with-pydebug` gdb is not installed in the builds and hence the test_gdb is skipped. Adding installation of gdb will help in making sure test_gdb is run.

# test_gdb skipped : 

* https://travis-ci.org/python/cpython/jobs/394900803#L1532

# After installation of gdb 

My build fails due to urllib errors and trying to install gdb using sudo apt-get install gdb on MacOS. The config can be fixed.

test_gdb tests : https://travis-ci.org/tirkarthi/cpython/jobs/394947895#L2501

I am willing to make a PR for Travis but I don't know how VSTS config works to test it on VSTS builds with an account.

Thanks