Fixing build dependencies

Base image already gives us `build-essential`, but nothing provided
`fakeroot`. :(
1 job for add/build in 1 minute and 31 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed #3999
package

00:01:31

 
Name Stage Failure
failed
package Build
dpkg-buildpackage: info: source distribution stable
dpkg-buildpackage: info: source changed by Erick Hitter <nginx-build@mxh.ethitter.com>
dpkg-source --before-build nginx-package-build
dpkg-buildpackage: info: host architecture amd64
dpkg-source: error: syntax error in nginx-package-build/debian/control at line 5: first block lacks a Source field
dpkg-buildpackage: error: dpkg-source --before-build nginx-package-build gave error exit status 25
debuild: fatal error at line 1116:
dpkg-buildpackage -rfakeroot -us -uc failed
ERROR: Job failed: exit code 1