lib/oeqa/decorators: handle broken links when creating new symlink

When checking if a link exists before creating it, use os.path.lexists() as
otherwise os.path.exists() on a broken link will return False.

(From OE-Core rev: ec24b6de2b8686e1f779fef3a963e66f70eeba74)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/utils/decorators.py

@@ -190,7 +190,7 @@ def LogResults(original_class):
             local_log.results("Testcase "+str(test_case)+": PASSED")
 
         # Create symlink to the current log
-        if os.path.exists(linkfile):
+        if os.path.lexists(linkfile):
             os.remove(linkfile)
         os.symlink(logfile, linkfile)