Work around altered --itemize-changes output in OSX Homebrew rsync forumala

The current OSX Homebrew installer for rsync 3.1.1 applies a patch that adds
an extra character to the output of --itemize-changes. This causes all itemized
change output lines to fail matching a regular expression in our code, causing
Beam to report no files where changed, even if rsync had output.

Ideally this will be fixed in the Homebrew rsync forumla, however to avoid Beam
users encountering this bug in the wild for now, I've added this work around.

Rsync patch: https://git.samba.org/?p=rsync-patches.git;a=blob_plain;hb=v3.1.1;f=crtimes.diff
(Search for: diff --git a/log.c b/log.c)

Related ticket: https://github.com/Homebrew/homebrew-dupes/issues/343