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

Change-Id: I230ac74f3fd1e7912c1645f36383913ff5bd3d2c
Refs: #3599
diff --git a/docs/code-style.rst b/docs/code-style.rst
index f3a1c63..c57fd0a 100644
--- a/docs/code-style.rst
+++ b/docs/code-style.rst
@@ -440,7 +440,7 @@
         class Class
         {
         private:
-          T m_member = {arg1, arg2}; // not supported by GCC 4.6
+          T m_member = {arg1, arg2};
           static T s_member = {arg1, arg2};
         };