[tracker-miners] build: Fix build with libav

[Carlos Garnacho <carlosg src gnome org>]

commit fff231c16b2ad9a2824f09c5b81f31ee220fba6f
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Sep 10 16:19:20 2018 +0200

    build: Fix build with libav
    
    The extractor rules defined an array inside an array, which configure_file()
    wouldn't accept.

 src/tracker-extract/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/tracker-extract/meson.build b/src/tracker-extract/meson.build
index 9834dc422..bf19f8bac 100644
--- a/src/tracker-extract/meson.build
+++ b/src/tracker-extract/meson.build
@@ -60,7 +60,7 @@ if libjpeg.found()
 endif
 
 if generic_media_handler_name == 'libav'
-  rules = ['90-libav-audio-generic.rule', ['90-libav-video-generic.rule']]
+  rules = ['90-libav-audio-generic.rule', '90-libav-video-generic.rule']
   dependencies = [avcodec, avformat, avutil, tracker_miners_common_dep]
   modules += [['extract-libav', 'tracker-extract-libav.c', rules, dependencies]]
 endif