gnu: racket: Update to 8.13.
* gnu/packages/patches/racket-backport-8.12-chez-configure.patch: Delete
obsolete patch.
* gnu/local.mk (dist_patch_DATA): Remove it.
* gnu/packages/racket.scm (%racket-origin)[patches]: Likewise.
* gnu/packages/chez.scm (chez-scheme-for-racket): Update to
10.0.1-pre-release.1.
* gnu/packages/racket.scm (%racket-version): Update to 8.13.
(racket)[inputs]<data, deinprogramm, drracket, eopl, expeditor, gui>
<htdp, math, net-cookies, option-contract, pict, plai, plot, rackunit>
<redex, scribble, snip, typed-racket, srfi, web-server>: Update hashes.
Change-Id: I2d7b6e79a5a4e775d9b918b39fb688b484bb9f93
Signed-off-by: Efraim Flashner <efraim@flashner.co.il>
21402e6193