Update folly/thrift README with tested deps for Ubuntu 13.10 and 14.04

Test Plan: no

Reviewed By: lesha@fb.com

Subscribers: alandau, jhj, kma

FB internal diff: D1434163
moar backquotes

Summary: because github flavored markdown

Test Plan: no

Reviewed By: lesha@fb.com

Subscribers: alandau, jhj, kma

FB internal diff: D1434453