makefile: awesome_bot: ignore SSL errors on https://flaskbb.org/

- https://flaskbb.org/ SSL_connect returned=1 errno=0 state=SSLv2/v3 read server hello A: tlsv1 alert protocol

Makefile

@@ -1,6 +1,6 @@
 #!/usr/bin/make -f
 SHELL = /bin/bash
-AWESOME_BOT_OPTIONS = --allow-redirect --skip-save-results --allow 202 --white-list airsonic.github.io/docs/apps
+AWESOME_BOT_OPTIONS = --allow-redirect --skip-save-results --allow 202 --white-list airsonic.github.io/docs/apps,flaskbb.org
 
 all: check_all