Update to Pigeonhole 0.3.3.

Changelog v0.3.2:

+ sieve-refilter tool: improved man page documentation by explicitly specifying
  the syntax used for mailbox arguments.
+ Sieve: spamtest and virustest extensions: improved trace debugging of score
  calculation.
+ Sieve: made error messages about exceeding the maximum number of actions more
  verbose.
- Sieve tools: fixed problems with running as root: sievec and sieve-dump now
  ignore mail_uid and mail_gid settings when run as root.
- Sieve: fixed bug in action accounting (for limit checking): increase action
  instance count only when an action is actually created.
- Sieve: include extension: fixed namespace separation of :global and :personal
  scripts.
- ManageSieve: fixed segfault bug triggered by CHECKSCRIPT command.
- Fixed linking with ld.gold.
- Fixed several Clang compile warnings and a few potential bugs.

Changelog v0.3.3:

- Fixed compile against installed Dovecot headers. This was broken by the
  ld.gold fix in the previous release.

(ghen)