facebook/hhvm — pull request #2086 by Jo-Con-El (2014-03-17 15:48:29+00:00)
Title: HHVM itself does not depend on boost_regex.

Only third-party/folly depends on libboost_regex, but HHVM has a
dependency that causes a bogus linkage in the final binary.

Sync with Debian patch 09_remove_boost_regex_hhvm.patch from 2.4.1-1.