update test_utf8_codecvt test to use std::istream_iterator.

update other tests for improvements in base64_from_binary
tweak test_complex to play nice with PGI library.

[SVN r82200]

libs/serialization

@@ -1 +1 @@
-Subproject commit de0d30d99c94c7b6f275953ee8b2a9d2a4a27f44
+Subproject commit 225b1e326bac8e51e0cb440c22d1c6cdb7abc523