add more thread example and Chinese comments.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@519 bbd45198-f89e-11dd-88c7-29a3b14d5316

examples/kernel/SConscript

@@ -9,6 +9,10 @@ thread_same_priority.c
 thread_static_simple.c
 thread_dynamic_simple.c
 thread_delete.c
+thread_detach.c
+thread_yield.c
+thread_suspend.c
+thread_resume.c
 semaphore_static.c
 semaphore_dynamic.c
 semaphore_priority.c