Various give-backs

[Adrian Bunk <bunk@stusta.de>]

Packages in this list:
- source upload >= 7 days ago
- no RC bugs in the package
- I cannot exclude the possibility that it might now build

I will do further actions (often filing RC bugs) for all packages that 
still fail after retrying.

gb prometheus-alertmanager_0.5.1+ds-1 . amd64 s390x
gb prometheus_1.2.3+ds2-4 . armel
gb mccs_1:1.1-4 . armel
gb mkvtoolnix_9.6.0-1 . mips64el
gb statsmodels_0.8.0~rc1+git59-gef47cd9-1 . i386
gb openmprtl_3.9.0-2 . ppc64el s390x
gb testdisk_7.0-2 . mips
gb webauth_4.7.0-4 . armhf
gb libcereal_1.2.1-2 . armel
gb libguestfs_1:1.34.3-5 . armhf ppc64el


Thanks
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed