Second Focal Fossa test rebuild

[Matthias Klose]

The second test rebuild of Focal Fossa was started on March 27 2020 for
all architectures, all components. The rebuild is finished for the main
component, still running for the universe/multiverse components.

Results (please also look at the superseded builds) can be found at

https://people.canonical.com/~doko/ftbfs-report/test-rebuild-20200327-focal-focal.html

The report uses some additional color coding, marking packages different which
always failed to build, or where the build failure is no regression compared to
eoan.

Additional build failures for packages in focal-proposed (not yet in focal)
can be found at http://qa.ubuntuwire.com/ftbfs/

Please help fixing the build failures.

There is also a test rebuild with GCC trunk enabled by default.
Focal will ship with GCC 10 (as an optional compiler, not the
default), and become the default GCC in 20.10.

https://people.canonical.com/~doko/ftbfs-report/test-rebuild-20200327-focal-gcc10-focal.html

Matthias