Update libfreetype (OSX 10.8 support)

MNPP uses own old libs:
<code>$ cat ~/.bash_profile | grep DYLD_LIBRARY_PATH
export DYLD_LIBRARY_PATH=/Applications/MNPP/init:/Applications/MNPP/Library/lib</code>

It conflicts with an already used libraries from XQuartz 2.7.2
<code>Dyld Error Message:
  Library not loaded: /opt/X11/*/libfreetype.6.dylib
  Referenced from: /opt/X11/*/libXfont.1.dylib
  Reason: Incompatible library version: libXfont.1.dylib requires version 15.0.0 or later, but libfreetype.6.dylib provides version 14.0.0</code>

Same problem with 10.7 is <a href="https://github.com/jyr/MNPP/issues/28">here</a>.