* 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
to fix breakage.
This is intended to fix the same breakage as
https://github.com/google/oss-fuzz/pull/6327. But this fix does
not prevent us from creating new language builder images that do
not use xenial.
Related: #6180
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