When using bootstrapped runtimes, add package.include to deployable zip file

[alexanderwink]

If there were package.include specified for a function that used a bootstrapped runtime the includes would simply be ignored. This PR will add the includes to the zip-file and ensure that they are deployed alongside the binary.

[lphuctai]

Hi @mthenw
I see you were fix this issue before in #40
But in the case of buildProvidedRuntimeAsBootstrap = true
It will return like this
return { individually: true, artifact: zipPath, };
This does not include property here, and makes the extension crash when we're trying to access it
packageConfig.include = packageConfig.include.concat( this.serverless.service.functions[name].package.include );

So this pull request completely fixes it!

[mthenw]

I'm gonna release new version later today or tomorrow.

[mthenw]

@alexanderwink @lphuctai new version (2.4.0) released.