Update to FreeType 2.4.6+

This patch updates our copy of the FreeType sources to 2.4.6+.

More precisely, it contains source code corresponding to the
state of the upstream repository at the following hash
submitted on August 16 2001:

  c3fb981e2ac79acad09d5673352646696472f55e

This corresponds to 2.4.6 with 7 more patches applied on top
of it to fix bugs in the TrueType interpreter and the CFF parser.

Change-Id: I9f3ac736d616020c8d10fd1d4e4be466f35fb6e7
72 files changed