Comment 4 for bug 1127620

Fix-commited:
https://git.linaro.org/gitweb?p=ci/ubuntu-build-service.git;a=commitdiff;h=160d09410545d1d73e0ad0138bb4abb1d4a2b2d5

Syntax to get dbgsym packages has changed in launchpad, making stress-dbgsym uninstallable for perf test. Adding main/debug component resolves the issue.