gnu: strongswan: Update to 5.8.0 [fixes CVE-2018-17540, CVE-2018-2065{0,1}].

* gnu/packages/networking.scm (strongswan): Update to 5.8.0.

gnu/packages/networking.scm

@@ -1870,14 +1870,14 @@ (define-public mtr
 (define-public strongswan
   (package
     (name "strongswan")
-    (version "5.6.3")
+    (version "5.8.0")
     (source
      (origin
        (method url-fetch)
        (uri (string-append "https://download.strongswan.org/strongswan-"
                            version ".tar.bz2"))
        (sha256
-        (base32 "095zg7h7qwsc456sqgwb1lhhk29ac3mk5z9gm6xja1pl061driy3"))))
+        (base32 "0cq9m86ydd2i0awxkv4a256f4926p2f9pzlisyskl9fngl6f3c8m"))))
     (build-system gnu-build-system)
     (arguments
      `(#:phases