[physfs] [patch] update zlib to 1.2.2

[Adam D. Moss]

Adam D. Moss wrote:
> Zlib 1.2.2 has some correctness fixes and a security
> fix.  This patch upgrades physfs's internal zlib from
> 1.2.1 to 1.2.2 (the directory is still called 1.2.1, but
> that's thankfully easy to change with subversion -- I wish
> svn's patch format also somehow encompassed svn's nice
> features like versioned renames, grumble grumble).

*bump?*  :)