Add a packaging troubleshooting page

[davidjharder]

We need a page for troubleshooting when packaging.

Things to include:

• How to do a rebase for a conflict
• How to rebase to change commit order (for stacks)
• How to dump a package.yml and solbuild output to GH gist
• Other common issues:
  • ~~History in pspec is crazy -> you forgot to bump~~ Not a thing now: https://github.com/getsolus/packages/commit/0e6cad07d2bf75da639deceada7f5ec4fc2d371c
  • Document the ~~cryptic~~ perfectly reasonable error message from when a tarball signature doesn't match
  • ??

[davidjharder]

Reilly's weird tar bug: http://homebank.free.fr/public/sources/homebank-5.7.1.tar will send a tar.gz, file breaking something

[malfisya]

This one is pretty simple, a few packages i encountered still have %configure instead of %reconfigure. I just replace it

[davidjharder]

Joey says that the use of go-grab means that the first connection to sourceforge fails.

[davidjharder]

joey: ./configure $(sed 's|--runstatedir=/run||g' <<< "%CONFOPTS%") if reconfigure doesn't work

[davidjharder]

mount: /var/lib/solbuild/roots/unstable-x86_64: WARNING: source write-protected, mounted read-only

[davidjharder]

delete cache if solbuild is eating your disk