Bug #45630 rpl_trigger.test causes valgrind failures within nptl_pthread_exit_hack_handler

The server shutdown and start code triggered the valgrind failures 
within nptl_pthread_exit_hack_handler on Ubuntu 9.04, x86 (but not amd64) 
in rpl_trigger.test file.

For fixing the bug, suppress valgrind failures within nptl_pthread_exit_hack_handler 
on Ubuntu 9.04, x86 (but not amd64). Because the server shutdown and start
code has been heavily used in mysql test set.

mysql-test/valgrind.supp:
  Add code for suppressing valgrind failures within nptl_pthread_exit_hack_handler on Ubuntu 9.04, x86 (but not amd64).

mysql-test/valgrind.supp

@@ -517,3 +517,111 @@
    fun:dlopen*
 }
 
+#
+# BUG#45630
+# Suppress valgrind failures within nptl_pthread_exit_hack_handler on Ubuntu 9.04, x86 (but not amd64)
+#
+
+{
+   Mem loss within nptl_pthread_exit_hack_handler 1
+   Memcheck:Leak
+   fun:malloc
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/libc-*.so
+   obj:*/ld-*.so
+   fun:__libc_dlopen_mode
+   fun:pthread_cancel_init
+   fun:_Unwind_ForcedUnwind
+   fun:__pthread_unwind
+   fun:pthread_exit
+   fun:nptl_pthread_exit_hack_handler
+   fun:start_thread
+   fun:clone
+}
+
+{
+   Mem loss within nptl_pthread_exit_hack_handler 2
+   Memcheck:Leak
+   fun:malloc
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/libc-*.so
+   obj:*/ld-*.so
+   fun:__libc_dlopen_mode
+   fun:pthread_cancel_init
+   fun:_Unwind_ForcedUnwind
+   fun:__pthread_unwind
+   fun:pthread_exit
+   fun:nptl_pthread_exit_hack_handler
+   fun:start_thread
+   fun:clone
+}
+
+{
+   Mem loss within nptl_pthread_exit_hack_handler 3
+   Memcheck:Leak
+   fun:calloc
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/libc-*.so
+   obj:*/ld-*.so
+   fun:__libc_dlopen_mode
+   fun:pthread_cancel_init
+   fun:_Unwind_ForcedUnwind
+   fun:__pthread_unwind
+   fun:pthread_exit
+   fun:nptl_pthread_exit_hack_handler
+   fun:start_thread
+   fun:clone
+}
+
+{
+   Mem loss within nptl_pthread_exit_hack_handler 4
+   Memcheck:Leak
+   fun:malloc
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/libc-*.so
+   obj:*/ld-*.so
+   fun:__libc_dlopen_mode
+   fun:pthread_cancel_init
+   fun:_Unwind_ForcedUnwind
+   fun:__pthread_unwind
+   fun:pthread_exit
+   fun:nptl_pthread_exit_hack_handler
+   fun:start_thread
+}
+
+{
+   Mem loss within nptl_pthread_exit_hack_handler 5
+   Memcheck:Leak
+   fun:calloc
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/ld-*.so
+   obj:*/libc-*.so
+   obj:*/ld-*.so
+   fun:__libc_dlopen_mode
+   fun:pthread_cancel_init
+   fun:_Unwind_ForcedUnwind
+   fun:__pthread_unwind
+   fun:pthread_exit
+   fun:nptl_pthread_exit_hack_handler
+   fun:start_thread
+}
+