FXIOS-1360 ⁃ I can't build using Xcode 12.0

[data-sync-user]

I am followed the steps. But, I can't get successful build. Seems, I am missing soothing that's not listed in Building the code.

I tried last release firefoxios30.0 as well. Latest one and last release builds with exactly same error.

Build input file cannot be found

https://ibb.co/3NQQvQP

So, I deleted the unknown files in each target and builded again then I got below error,

Type 'GleanMetrics' has no member 'ReadingList'

https://ibb.co/TT86mvr

┆Issue is synchronized with this Jira Task

[dnarcese]

Can you try deleting the Carthage folder and then running ./bootstrap.sh --force