dim: Dumbest base64 parser ever for apply-pull

Avoids me having to ask patchwork to decode them for me. Worked on the
2 pulls from Dave and Inki I tried it on.

v2: Use message_print_body (Jani).

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Dave Airlie <airlied@gmail.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

dim

@@ -990,7 +990,7 @@ function dim_apply_pull
 
 	cat > $file
 
-	pull_branch=$(sed -ne '/[gG]it repository at:$/{n;n;p}' $file)
+	pull_branch=$(message_print_body "$file" | sed -ne '/[gG]it repository at:$/{n;n;p}')
 	from_line=$(grep '^From:' $file)
 
 	if [[ -z "$pull_branch" ]] ; then