oeqa.buildperf: correct globalres time format

Always use two digits for (integer part of) seconds, i.e. show '1:02.34'
instead of '1:2.34'.

(From OE-Core rev: 55bb6816aca39bfa25d4f7e2158a57a5f0ac1cca)

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/buildperf/base.py

@@ -404,7 +404,7 @@ class BuildPerfTestCase(unittest.TestCase):
 
         # Append to 'times' array for globalres log
         e_sec = etime.total_seconds()
-        self.times.append('{:d}:{:02d}:{:.2f}'.format(int(e_sec / 3600),
+        self.times.append('{:d}:{:02d}:{:05.2f}'.format(int(e_sec / 3600),
                                                       int((e_sec % 3600) / 60),
                                                        e_sec % 60))