Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/Makefile

+#
+# FreeType 2 build system -- top-level Makefile
+#
+
+
+# Copyright 1996-2015 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.
+
+
+# Project names
+#
+PROJECT       := freetype
+PROJECT_TITLE := FreeType
+
+# The variable TOP_DIR holds the path to the topmost directory in the project
+# engine source hierarchy.  If it is not defined, default it to `.'.
+#
+TOP_DIR ?= .
+
+# The variable OBJ_DIR gives the location where object files and the
+# FreeType library are built.
+#
+OBJ_DIR ?= $(TOP_DIR)/objs
+
+
+include $(TOP_DIR)/builds/toplevel.mk
+
+# EOF