cyrus-sasl: Explicitly define the openssl path

cyrus-sasl static libraries require linked binaries to pull in openssl
via -lcrypto and -lssl. This is problematic because it does not specify
-L${openssl}/lib when not explcitly configure to do so. This patch
forces cyrus-sasl to add -L${openssl}/lib to the static libraries which
propagates the openssl library path to linked binaries.

pkgs/development/libraries/cyrus-sasl/default.nix

@@ -17,6 +17,10 @@ stdenv.mkDerivation rec {
   patches = [ ./missing-size_t.patch ]; # https://bugzilla.redhat.com/show_bug.cgi?id=906519
   patchFlags = "-p0";
 
+  configureFlags = [
+    "--with-openssl=${openssl}"
+  ];
+
   # Set this variable at build-time to make sure $out can be evaluated.
   preConfigure = ''
     configureFlagsArray=( --with-plugindir=$out/lib/sasl2