rootfs.py: two changes regarding log checking

This patch involves two changes.

1. Extend the regular expression to also catch '^WARNING:' in _log_check_warn.
   Warnings from bb.note or bbnote begin with 'WARNING:'. So if we decide to
   catch warnings at rootfs time, we should not ignore those produced by
   the build system itself.

2. Delay _log_check in rootfs process so that more warnings are likely to be
   catched. Note that we should at least delay the _log_check after the
   execution of ROOTFS_POSTPROCESS_COMMANDS, because we want to catch warnings
   there.

(From OE-Core rev: 4c9213dffb71510ba99a0665f620e9de4a2dfeb5)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/rootfs.py

@@ -128,6 +128,7 @@ class Rootfs(object):
             self._generate_kernel_module_deps()
 
         self._cleanup()
+        self._log_check()
 
     def _uninstall_unneeded(self):
         # Remove unneeded init script symlinks
@@ -327,8 +328,6 @@ class RpmRootfs(Rootfs):
 
         self.pm.install_complementary()
 
-        self._log_check()
-
         if self.inc_rpm_image_gen == "1":
             self.pm.backup_packaging_data()
 
@@ -355,7 +354,7 @@ class RpmRootfs(Rootfs):
         pass
 
     def _log_check_warn(self):
-        r = re.compile('^(warn|Warn|NOTE: warn|NOTE: Warn)')
+        r = re.compile('^(warn|Warn|NOTE: warn|NOTE: Warn|WARNING:)')
         log_path = self.d.expand("${T}/log.do_rootfs")
         with open(log_path, 'r') as log:
             for line in log.read().split('\n'):