[PATCH] xfstests: fix wallclock possibly wrapped problem

[Wanlong Gao <gaowanlong@xxxxxxxxxxxxxx>]

If a test cross two days, the time may be negative, let's use
the UTC seconds instead, for example:

2014-04-03 23:43:42 ./check generic/074 generic/075 generic/112 generic/113 
generic/132 generic/133 generic/231
FSTYP         -- xfs (non-debug)
PLATFORM      -- Linux/x86_64 vpx-2 3.14.0-00001-g462fa88
MKFS_OPTIONS  -- -f -bsize=4096 /dev/vdd
MOUNT_OPTIONS -- /dev/vdd /fs/scratch

generic/074      100s
generic/075      220s
generic/112      226s
generic/113      188s
generic/132      18s
generic/133      37s
generic/231      -85401s
Ran: generic/074 generic/075 generic/112 generic/113 generic/132 generic/133 
generic/231
Passed all 7 tests

Reported-by: Yuanhan Liu <yuanhan.liu@xxxxxxxxxxxxxxx>
Signed-off-by: Wanlong Gao <gaowanlong@xxxxxxxxxxxxxx>
---
 check | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/check b/check
index 8f1a6e1..a7e33ea 100755
--- a/check
+++ b/check
@@ -146,7 +146,7 @@ trim_test_list()
 
 _wallclock()
 {
-    date "+%H %M %S" | $AWK_PROG '{ print $1*3600 + $2*60 + $3 }'
+    date "+%s"
 }
 
 _timestamp()
-- 
1.9.1.475.ge4eef26