gnu: wireless-tools: Install the manual pages under $out/share/man.

* gnu/packages/linux.scm (wireless-tools)[origin]: Add snippet.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/linux.scm

@@ -1487,7 +1487,13 @@ (define-public wireless-tools
                                   version ".tar.gz"))
               (sha256
                (base32
-                "0qscyd44jmhs4k32ggp107hlym1pcyjzihiai48xs7xzib4wbndb"))))
+                "0qscyd44jmhs4k32ggp107hlym1pcyjzihiai48xs7xzib4wbndb"))
+              (modules '((guix build utils)))
+              (snippet
+               ;; Install the manual pages in the right place.
+               '(substitute* "Makefile"
+                  (("INSTALL_MAN= .*")
+                   "INSTALL_MAN= $(PREFIX)/share/man")))))
     (build-system gnu-build-system)
     (arguments
      `(#:phases (alist-replace