build: require gcc >= 4.8.2 and boost >= 1.54.0

Change-Id: I230ac74f3fd1e7912c1645f36383913ff5bd3d2c
Refs: #3599
diff --git a/wscript b/wscript
index cbf66ca..ba82eed 100644
--- a/wscript
+++ b/wscript
@@ -106,8 +106,8 @@
         conf.define('HAVE_TESTS', 1)
 
     conf.check_boost(lib=USED_BOOST_LIBS, mandatory=True)
-    if conf.env.BOOST_VERSION_NUMBER < 104800:
-        Logs.error("Minimum required boost version is 1.48.0")
+    if conf.env.BOOST_VERSION_NUMBER < 105400:
+        Logs.error("Minimum required boost version is 1.54.0")
         Logs.error("Please upgrade your distribution or install custom boost libraries" +
                     " (http://redmine.named-data.net/projects/nfd/wiki/Boost_FAQ)")
         return