[build] Try to continue if mozroots fails

mozroots will fail if you are disconnected from the internet.
However if the nuget packages are already in the download cache,
you don't need the internet anyway!
Indent to 'match' when a match statement is encountered
Merge pull request #630 from alanmcgovern/master

[build] Try to continue if mozroots fails
Merge pull request #631 from rojepp/indenter_polish

Indent to 'match' when a match statement is encountered