thread move constructor is not explicit, so self() compiles for MSVC8 and Intel; thread_exit_callback_node constructor added to remove warnings on MSVC8; thread destructor no longer calls cancel

[SVN r40456]

libs/thread

@@ -1 +1 @@
-Subproject commit 1af08f70859adedd5d4265c6c691678df1d316c6
+Subproject commit ee3d772235bf4300a8b66337f849ca7ace5bc3a1