Revert "gnu: nss: Update to 3.45 [security fixes]."

This reverts commit 95580bda05.

Note that the security fixes mentioned in that commit were already
present in NSS 3.44.1, which is the version that's now reinstated
by this revert.  The rationale for this revert is that NSS 3.45 fails
to build on armhf-linux.

gnu/packages/nss.scm

@@ -70,7 +70,7 @@ in the Mozilla clients.")
 (define-public nss
   (package
     (name "nss")
-    (version "3.45")
+    (version "3.44.1")
     (source (origin
               (method url-fetch)
               (uri (let ((version-with-underscores
@@ -81,7 +81,7 @@ in the Mozilla clients.")
                       "nss-" version ".tar.gz")))
               (sha256
                (base32
-                "12sfq9xvpwpc22qnjsg1if1lmchiy33byrh92wn91phz7li0abqi"))
+                "1y0jvva4s3j7cjz22kqw2lsml0an1295bgpc2raf7kc9r60cpr7w"))
               ;; Create nss.pc and nss-config.
               (patches (search-patches "nss-pkgconfig.patch"
                                        "nss-increase-test-timeout.patch"))))