oeqa/selftest: fix test_incremental_image_generation for changes in log output

test_incremental_image_generation case failed because the log output
chanaged:

FAIL: test_incremental_image_generation (oeqa.selftest.buildoptions.ImageOptionsTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File
  "/buildarea3/yzhao1/poky-build/meta/lib/oeqa/utils/decorators.py", line 90, in wrapped_f
    return func(*args)
  File
  "/buildarea3/yzhao1/poky-build/meta/lib/oeqa/selftest/buildoptions.py", line 25, in test_incremental_image_generation
    self.assertEqual(0, res.status, msg="No match for openssh-sshd in log.do_rootfs")
AssertionError: 0 != 1 : No match for openssh-sshd in log.do_rootfs
----------------------------------------------------------------------

Using re search instead grep

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions