Catching shlex splitting error in fact gathering get_cmdline call

Fixes #8352

lib/ansible/module_utils/facts.py

@@ -327,12 +327,15 @@ class Facts(object):
         data = get_file_content('/proc/cmdline')
         if data:
             self.facts['cmdline'] = {}
-            for piece in shlex.split(data):
-                item = piece.split('=', 1)
-                if len(item) == 1:
-                    self.facts['cmdline'][item[0]] = True
-                else:
-                    self.facts['cmdline'][item[0]] = item[1]
+            try:
+                for piece in shlex.split(data):
+                    item = piece.split('=', 1)
+                    if len(item) == 1:
+                        self.facts['cmdline'][item[0]] = True
+                    else:
+                        self.facts['cmdline'][item[0]] = item[1]
+            except ValueError, e:
+                pass
 
     def get_public_ssh_host_keys(self):
         dsa_filename = '/etc/ssh/ssh_host_dsa_key.pub'