[newlib-cygwin] RISC-V: Fixed return code in _times syscall.

[Corinna Vinschen <corinna@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=258996b696acc2efda5cc10390d373660157b22c

commit 258996b696acc2efda5cc10390d373660157b22c
Author: Denis Ivanov <denis.ivanov@cloudbear.ru>
Date:   Fri Jul 6 12:03:15 2018 +0300

    RISC-V: Fixed return code in _times syscall.
    
    Upon successful completion, times() shall return the elapsed real time,
    in clock ticks, since an arbitrary point in the past (for example,
    system start-up time).
    
    Signed-off-by: Kito Cheng <kito.cheng@gmail.com>

Diff:
---
 libgloss/riscv/sys_times.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libgloss/riscv/sys_times.c b/libgloss/riscv/sys_times.c
index eb0ef9d..fc8133a 100644
--- a/libgloss/riscv/sys_times.c
+++ b/libgloss/riscv/sys_times.c
@@ -23,7 +23,7 @@ _times(struct tms *buf)
 {
   // when called for the first time, initialize t0
   static struct timeval t0;
-  if (t0.tv_sec == 0)
+  if (t0.tv_sec == 0 && t0.tv_usec == 0)
     _gettimeofday (&t0, 0);
 
   struct timeval t;
@@ -33,5 +33,5 @@ _times(struct tms *buf)
   buf->tms_utime = utime * CLOCKS_PER_SEC / 1000000;
   buf->tms_stime = buf->tms_cstime = buf->tms_cutime = 0;
 
-  return -1;
+  return buf->tms_utime;
 }