Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/README.git

+The git  archive doesn't  contain pre-built configuration  scripts for
+UNIXish platforms.  To generate them say
+
+  sh autogen.sh
+
+which in turn depends on the following packages:
+
+  automake (1.10.1)
+  libtool (2.2.4)
+  autoconf (2.62)
+
+The versions given  in parentheses are known to  work.  Newer versions
+should work too, of course.   Note that autogen.sh also sets up proper
+file permissions for the `configure' and auxiliary scripts.
+
+The autogen.sh script  now checks the version of  above three packages
+whether they match the numbers  above.  Otherwise it will complain and
+suggest either upgrading or using  an environment variable to point to
+a more recent version of the required tool(s).
+
+Note that  `aclocal' is provided  by the `automake' package  on Linux,
+and that `libtoolize' is called `glibtoolize' on Darwin (OS X).
+
+
+For static builds which  don't use platform specific optimizations, no
+configure script is necessary at all; saying
+
+  make setup ansi
+  make
+
+should work on all platforms which have GNU make (or makepp).
+
+
+Similarly, a  build with  `cmake' can  be done  directly from  the git
+repository.
+
+
+----------------------------------------------------------------------
+
+Copyright 2005-2015 by
+David Turner, Robert Wilhelm, and Werner Lemberg.
+
+This  file is  part of  the FreeType  project, and  may only  be used,
+modified,  and distributed  under the  terms of  the  FreeType project
+license,  LICENSE.TXT.  By  continuing to  use, modify,  or distribute
+this file you  indicate that you have read  the license and understand
+and accept it fully.
+
+
+--- end of README.git ---