nfd, ndn-cxx: Update to version 0.3.1

Change-Id: I847c29f53391d8207e9bdc8c4a1389462db05160
diff --git a/net/nfd/Portfile b/net/nfd/Portfile
index 81390ec..2426414 100644
--- a/net/nfd/Portfile
+++ b/net/nfd/Portfile
@@ -4,16 +4,15 @@
 PortSystem          1.0
 PortGroup           github 1.0
 
-github.setup        named-data NFD NFD-0.3.0
-checksums           rmd160  1adfd25be1889ff0fa0073fcab1b9f6b82371ba0 \
-                    sha256  695274851fa3b9c0b17cc2e16ff00259749bae35ef429c5a90400f93b3daf6a0
+github.setup        named-data NFD NFD-0.3.1
+checksums           rmd160  5971a2be0cc4f734947a011a31259fea4ddbe5df \
+                    sha256  a45a1196ac1929cc71b10ff279d56aebb1b07f7505787999af5b2dd36c321620
 
 name                nfd
 homepage            http://named-data.net/doc/NFD/
 license             GPL3+
-version             0.3.0
+version             0.3.1
 epoch               3
-revision            1
 
 categories          net
 platforms           darwin