seed_rng.hpp - removed incorrect comment

seed_rng.hpp - used ignore_size() to get rid of warnings
seed_rng.hpp - initialize m_value in generator_iterator constructor
sha1.hpp - added #include <string> as std::runtime_error constructor needs it

[SVN r80846]

libs/uuid

@@ -1 +1 @@
-Subproject commit 5049a1bf67e2e0af18f2d74e8ab594a134a0a44e
+Subproject commit bec5de63aabe7b706387af4959a424d94a4c53a2