* Helper flags for swift compilation
* Documentation for swift project integration
* Adds swift to the languages with coverage
* Only thread sanitizer is supported
* Fixes swift coverage target compilation
* fixup flags facotring
* swift: run on new ubuntu
* fixup
* swift: right copy for symbolizer
This will prevent the builds from breaking when we do the upgrade.
Some of the issues I encountered were:
1. Installing no longer existing packages libstdc++-5-dev
2. Patch failing when I upgraded swift version (I think old version
doesn't work on focal).
Related: https://github.com/google/oss-fuzz/issues/6180
Right now this change is an NFC because base-builder-swift isn't
even being updated at the moment (see #6269)
Removes unnecessary stuff in base-builder image to create a base-builder-new, and then adds a base-builder-swift on top of this that swift projects can use (without JVM/Go/etc fuzzing).
Catena cyber