chromium/plugins: Break long line

Yes, I know I'm a bit nitpicky, but lines >80 chars are very ugly if you
have two windows side-by-side.

Thus no feature changes here.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

pkgs/applications/networking/browsers/chromium/plugins.nix

@@ -84,7 +84,9 @@ let
       wvModule = "@widevine@/lib/libwidevinecdmadapter.so";
       wvInfo = "#${wvName}#${wvDescription};${wvMimeTypes}";
     in ''
-      flashVersion="$(${jshon}/bin/jshon -F PepperFlash/manifest.json -e version -u)"
+      flashVersion="$(
+        "${jshon}/bin/jshon" -F PepperFlash/manifest.json -e version -u
+      )"
 
       install -vD PepperFlash/libpepflashplayer.so \
         "$flash/lib/libpepflashplayer.so"