gnu: crawl: Update to 0.29.0.

* gnu/packages/games.scm (crawl): Update to 0.29.0.
[source]<origin>: Use GIT-FETCH method.
[arguments]<#:make-flags>: Match new directory layout.
<#:phases>: Add a phase to set version without calling GIT.

* gnu/packages/patches/crawl-upgrade-saves.patch: Match new directory layout.

gnu/packages/games.scm

@@ -6515,14 +6515,16 @@ (define-public fillets-ng
 (define-public crawl
   (package
     (name "crawl")
-    (version "0.28.0")
+    (version "0.29.0")
     (source
      (origin
-       (method url-fetch)
-       (uri (string-append "https://github.com/crawl/crawl/releases/download/"
-                           version "/stone_soup-" version "-nodeps.tar.xz"))
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/crawl/crawl")
+             (commit version)))
+       (file-name (git-file-name name version))
        (sha256
-        (base32 "0irg5w4m127fxcj037kyp9vnyqyq1fi4q64rn6yq92w8z1lf2sss"))
+        (base32 "0cx67ln5qr4bawidi48ss63wflx7x22901da683c9wvy6m41vks8"))
        (patches (search-patches "crawl-upgrade-saves.patch"))))
     (build-system gnu-build-system)
     (inputs
@@ -6552,12 +6554,17 @@ (define-public crawl
               "BUILD_LUA="
               "BUILD_SQLITE="
               "BUILD_ZLIB="
-              "-Csource")
+              "-Ccrawl-ref/source")
       #:phases
       #~(modify-phases %standard-phases
+          (add-after 'unpack 'set-version
+            (lambda _
+              (call-with-output-file "crawl-ref/source/util/release_ver"
+                (lambda (port)
+                  (display #$version port)))))
           (add-after 'unpack 'find-SDL-image
             (lambda _
-              (substitute* "source/windowmanager-sdl.cc"
+              (substitute* "crawl-ref/source/windowmanager-sdl.cc"
                 (("SDL_image.h") "SDL2/SDL_image.h"))))
           (delete 'configure)
           (replace 'check

gnu/packages/patches/crawl-upgrade-saves.patch

@@ -6,8 +6,8 @@ upgrade is required, but guix nulls all file dates,
 and crawl would never upgrade saves.
 
 diff -ur a/source/database.cc b/source/database.cc
---- a/source/database.cc	2018-08-09 21:49:26.000000000 -0400
-+++ b/source/database.cc	2018-10-07 18:06:41.022445789 -0400
+--- a/crawl-ref/source/database.cc	2018-08-09 21:49:26.000000000 -0400
++++ b/crawl-ref/source/database.cc	2018-10-07 18:06:41.022445789 -0400
 @@ -24,6 +24,7 @@
  #include "stringutil.h"
  #include "syscalls.h"