[cpp] Added access modifier snippets.

snippets/cpp.snippets

@@ -47,6 +47,23 @@ snippet queue
 # std::priority_queue
 snippet pqueue
 	std::priority_queue<${1:T}> ${2};${3}
+##
+## Access Modifiers
+# private
+snippet pr
+	private
+# protected
+snippet po
+	protected
+# public
+snippet pu
+	public
+# friend
+snippet fr
+	friend
+# mutable
+snippet mu
+	mutable
 # std::cout
 snippet cout
 	std::cout << ${1} << std::endl;