[bug#50418] [PATCH core-updates-frozen 1/2] gnu: ocl-icd: Update project location.

[Sarah Morgensen <iskarian@mgsn.dev>]

The project seems to have permanently moved to Github, with no
distribution tarballs available, so update it.

* gnu/packages/opencl.scm (ocl-icd)[origin]: Retrieve source from Github
checkout instead of distribution tarballs.
[native-inputs]: Add 'autoconf', 'automake', and 'libtool'.
---
 gnu/packages/opencl.scm | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/gnu/packages/opencl.scm b/gnu/packages/opencl.scm
index e95d19db47..4c9c440b3d 100644
--- a/gnu/packages/opencl.scm
+++ b/gnu/packages/opencl.scm
@@ -1,6 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2018 Fis Trivial <ybbs.daans@hotmail.com>
 ;;; Copyright © 2018, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
+;;; Copyright © 2021 Sarah Morgensen <iskarian@mgsn.dev>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -131,19 +132,22 @@
     (name "ocl-icd")
     (version "2.2.12")
     (source (origin
-              (method url-fetch)
-              (uri (string-append
-                    "https://forge.imag.fr/frs/download.php/836/ocl-icd-"
-                    version ".tar.gz"))
-              (file-name (string-append name "-" version ".tar.gz"))
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/OCL-dev/ocl-icd")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
               (sha256
                (base32
-                "1x2dr8p4dkfds56r38av360i3nv1y3326jmshxvjngaf6mlg6rbn"))
+                "075pj99nanl75hyv93wys9ba3x7lhcdj0awdcd8bss6mdxqxj5mc"))
               (modules '((guix build utils)))
               (snippet
                '(delete-file-recursively "khronos-headers"))))
     (native-inputs
-     `(("opencl-headers" ,opencl-headers)
+     `(("autoconf" ,autoconf)
+       ("automake" ,automake)
+       ("libtool" ,libtool)
+       ("opencl-headers" ,opencl-headers)
        ("ruby" ,ruby)))
     (inputs
      `(("libgcrypt" ,libgcrypt)))
@@ -155,7 +159,7 @@
             (variable "OPENCL_VENDOR_PATH")
             (files '("etc/OpenCL/vendors")))))
     (search-paths native-search-paths)
-    (home-page "https://forge.imag.fr/projects/ocl-icd/")
+    (home-page "https://github.com/OCL-dev/ocl-icd/")
     (synopsis "OpenCL loader for Installable Client Drivers (ICDs)")
     (description
      "OpenCL implementations are provided as ICDs (Installable Client
-- 
2.32.0