gnu: Add ocl-icd.

* gnu/packages/opencl.scm (ocl-icd): New public variable.

gnu/packages/opencl.scm

@@ -197,6 +197,31 @@ (define-public clinfo
 the system.")
     (license license:cc0)))
 
+(define-public ocl-icd
+  (package
+    (name "ocl-icd")
+    (version "2.3.2")
+    (source
+     (origin
+       (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 "0y0lnxb6zlhfb5vxxib5n1vvxa4b23qc0j3lsih6yjz9j37mj7wz"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     (list autoconf automake libtool ruby))
+    (home-page "https://github.com/OCL-dev/ocl-icd")
+    (synopsis "Generic OpenCL @acronym{ICD, Installable Client Driver} loader")
+    (description
+     "This package provides an OpenCL @acronym{ICD, Installable Client Driver}
+loader.  It maintains a YAML database of all known and guessed function pointers
+from vendor-specific drivers.  It also delivers a skeleton of bindings to
+incorporate inside an OpenCL implementation to give it ICD functionalities.")
+    (license license:bsd-2)))
+
 (define-public beignet
   (package
     (name "beignet")