Merge commit '2a2889e130fee6d3c11e506328388afb317626ed'
* commit '2a2889e130fee6d3c11e506328388afb317626ed':
build: Remove stray duplicate conditional variable declaration
This commit is a noop, there is no duplicate in FFmpeg. we have the
tools rules kept in the root Makefile though (see
802d94c36e)
Merged-by: Clément Bœsch <cboesch@gopro.com>
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