kdegraphics-thumbnailers is marked for autoremoval from testing

[Debian testing autoremoval watch]

kdegraphics-thumbnailers 4:17.08.3-1 is marked for autoremoval from testing on 
2018-01-22

It (build-)depends on packages with these RC bugs:
877189: libkf5kexiv2: libkf5kexiv2 FTBFS: error: missing binary operator before 
token "defined"