* gnu/packages/bittorrent.scm (transmission): Update to 4.0.5.
[source]: Use 'transmission-4.0.5-fix-build.patch'.
* gnu/packages/patches/transmission-4.0.5-fix-build.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
Change-Id: I8e9486dca07f01628e7886e7ac5757d511056cb7