[gnome-backgrounds] optimize for size

[Jakub Steiner <jimmac src gnome org>]

commit be826c9373f54f39b768be988c8895ea8cc5073b
Author: Jakub Steiner <jimmac gmail com>
Date:   Mon Mar 9 11:46:27 2020 +0100

    optimize for size
    
    - try to be below 4MB each.

 backgrounds/Acrylic.jpg | Bin 4409535 -> 3362542 bytes
 backgrounds/Wood.jpg    | Bin 6970860 -> 2235508 bytes
 2 files changed, 0 insertions(+), 0 deletions(-)
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diff --git a/backgrounds/Acrylic.jpg b/backgrounds/Acrylic.jpg
index 3409f3e..701ba20 100644
Binary files a/backgrounds/Acrylic.jpg and b/backgrounds/Acrylic.jpg differ
diff --git a/backgrounds/Wood.jpg b/backgrounds/Wood.jpg
index 6ede2c0..e37f7f9 100644
Binary files a/backgrounds/Wood.jpg and b/backgrounds/Wood.jpg differ