oescripts: change compare logic in OEListPackageconfigTests

When multilib enabled and add layers/meta-openembedded/meta-oe in
conf/bblayers.conf, it reports below error when run oe-selftest.
 $ oe-selftest -r  oescripts
 [snip]
 [20:36:33-0700] 2022-05-16 03:36:33,494 - oe-selftest - INFO - RESULTS - oescripts.OEListPackageconfigTests.test_packageconfig_flags_option_flags: FAILED (585.37s)
 [snip]

 It is because the output of "list-packageconfig-flags.py -f" as below:
 $ ../scripts/contrib/list-packageconfig-flags.py -f
 [snip]
 qt                     lib32-pinentry  lib32-wxwidgets  nativesdk-pinentry  pinentry  pinentry-native  wxwidgets  wxwidgets-native
 secret                 lib32-pinentry  nativesdk-pinentry  pinentry  pinentry-native
 [snip]

 But the check logic as below:
 class OEListPackageconfigTests(OEScriptTests):
    #oe-core.scripts.List_all_the_PACKAGECONFIG's_flags
    def check_endlines(self, results,  expected_endlines):
        for line in results.output.splitlines():
            for el in expected_endlines:
                if line.split() == el.split():
                    expected_endlines.remove(el)
                    break

 def test_packageconfig_flags_option_flags(self):
        results = runCmd('%s/contrib/list-packageconfig-flags.py -f' % self.scripts_dir)
        expected_endlines = []
        expected_endlines.append("PACKAGECONFIG FLAG     RECIPE NAMES")
        expected_endlines.append("qt                     nativesdk-pinentry  pinentry  pinentry-native")
        expected_endlines.append("secret                 nativesdk-pinentry  pinentry  pinentry-native")

        self.check_endlines(results, expected_endlines)

And the test will fail as line.split() doesn't equal el.split() as
line.split() is ['lib32-pinentry', 'lib32-wxwidgets', 'nativesdk-pinentry',
'pinentry', 'pinentry-native', 'wxwidgets', 'wxwidgets-native'] and
el.split() is ['nativesdk-pinentry', 'pinentry', 'pinentry-native'].

So change the compare logic to fix the gap.

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 239f2284)
Signed-off-by: Steve Sakoman <steve@sakoman.com>