Add trailing newlines to siphash examples.

I'm not sure if I'll actually release this example. I don't think it does a
good job of demonstrating what I wanted.

[SVN r84249]

examples/siphash/Jamfile.v2

@@ -15,4 +15,4 @@ project unordered-test/example/siphash
 
 lib siphash : siphash.cpp siphash_generate.cpp /boost/random//boost_random ;
 
-run siphash_example.cpp siphash ;
+run siphash_example.cpp siphash ;

examples/siphash/siphash.cpp

@@ -88,4 +88,4 @@ namespace hash
 
         return v0 ^ v1 ^ v2 ^ v3;
     }
-}
+}

examples/siphash/siphash.hpp

@@ -201,4 +201,4 @@ namespace hash
 #endif
 }
 
-#endif
+#endif

examples/siphash/siphash_example.cpp

@@ -35,4 +35,4 @@ int main()
 
     assert(x1.bucket(10) == x2.bucket(10));
     assert(x1.bucket(30) == x2.bucket(30));
-}
+}

examples/siphash/siphash_generate.cpp

@@ -24,4 +24,4 @@ namespace hash
         k.k1 = gen();
         return k;
     }
-}
+}