travis: Add libseccomp-dev dependency to increase testing surface of demmt
This is a benefit of the move to a more modern, supported Ubuntu Xenial (16.04)
on Travis-CI's infrastructure.
@@ -14,7 +14,7 @@ addons:
- libpciaccess-dev
# Optional dependency needed by demmt
- libdrm-dev
- #- libseccomp-dev # Uncomment if Travis-CI includes on ubuntu-xenial apt package whitelist
+ - libseccomp-dev
# Optional dependency needed by nva
- libpciaccess-dev
- libx11-dev
