gnu: emacs-use-package: Update to commit da8c9e2.

This update is needed because the release tarball from github does not
contain all the files needed for us to build the package.

* gnu/packages/emacs.scm (emacs-use-package): Update to commit da8c9e2.
[source]: change to git.
[arguments]: Enable tests.

Signed-off-by: Marius Bakke <mbakke@fastmail.com>

gnu/packages/emacs.scm

@@ -5792,26 +5792,25 @@ abbreviation of the mode line displays (lighters) of minor modes.")
     (license license:gpl2+)))
 
 (define-public emacs-use-package
+  (let ((commit "da8c9e2840343906e732f9699e43d35a1f06481d")
+        (revision "1"))
     (package
      (name "emacs-use-package")
-    (version "2.3")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (string-append
-             "https://github.com/jwiegley/use-package/archive/"
-             version ".tar.gz"))
-       (file-name (string-append name "-" version ".tar.gz"))
+     (version (git-version "2.3" revision commit))
+     (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/jwiegley/use-package")
+                    (commit commit)))
+              (file-name (git-file-name name version))
               (sha256
                (base32
-         "0x4h136jb3imyli6zsh7dyzjrra6pv0v6b0yk94jdng3rdfcmsf5"))))
+                "0jz38pbq1p9h85i6qcsh3sfzkd103y6mw3rg5zd14dxigp8ir3xz"))))
      (build-system emacs-build-system)
      (propagated-inputs
       `(("emacs-diminish" ,emacs-diminish)))
      (arguments
-     ;; Tests fail in this release, but have been fixed in
-     ;; upstream commit 7956d40eed57d6c06bef36ebc174cf57d934e30d
-     `(#:tests? #f
+      `(#:tests? #t
         #:test-command '("emacs" "--batch"
                          "-l" "use-package-tests.el"
                          "-f" "ert-run-tests-batch-and-exit")))
@@ -5820,7 +5819,7 @@ abbreviation of the mode line displays (lighters) of minor modes.")
      (description "The use-package macro allows you to isolate package
 configuration in your @file{.emacs} file in a way that is both
 performance-oriented and tidy.")
-    (license license:gpl2+)))
+     (license license:gpl2+))))
 
 (define-public emacs-strace-mode
   (let* ((commit "6a69b4b06db6797af56f33eda5cb28af94e59f11")