!459 build_lite 支持selinux编译

Merge pull request !459 from steven_Q/master

hb_internal/preloader/preloader.py

@@ -305,6 +305,8 @@ class MyProduct():
             build_vars['product_company'] = config.get('device_company')
         if 'enable_ramdisk' in config:
             build_vars['enable_ramdisk'] = config.get('enable_ramdisk')
+        if 'build_selinux' in config:
+            build_vars['build_selinux'] = config.get('build_selinux')
         if 'support_jsapi' in config:
             build_vars['support_jsapi'] = config.get('support_jsapi')