Processed: add block tag

[Debian Bug Tracking System]

Processing commands for control at bugs.debian.org:

> block 798197 by 789826
Bug #798197 [sdformat] sdformat build-depends on libignition-math2-dev which is not available on armel and mips.
798197 was not blocked by any bugs.
798197 was not blocking any bugs.
Added blocking bug(s) of 798197: 789826
> thanks
Stopping processing here.

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-- 
798197: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=798197
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