fix: fix ppoll

1.modifications:
modified:   syscall/fs_syscall.c
2.modify 2 testcases:
IO/full/IO_test_ppoll_001.cpp
IO/full/IO_test_ppoll_002.cpp
3.influence:
none

Signed-off-by: pef <cyd1997@126.com>
Change-Id: I85fc091098a6dfef1a4694a3bbc489640ee6dda2

kernel/base/ipc/los_signal.c

@@ -226,7 +226,7 @@ int OsSigprocMask(int how, const sigset_t_l *setl, sigset_t_l *oldset)
     unsigned int intSave;
     sigset_t set;
     int retVal;
-
+    
     if (setl != NULL) {
         retVal = LOS_ArchCopyFromUser(&set, &(setl->sig[0]), sizeof(sigset_t));
         if (retVal != 0) {