Add the libaries and update script so additional configure parameters
can be passed. Also enable backtrace so it's closer to the defaults.
Signed-off-by: David Sterba <dsterba@suse.com>
Run ci/ci-build-musl to verify build of current branch works in
environment with musl libc. Also works for a given branch name.
Signed-off-by: David Sterba <dsterba@suse.com>