Update bundled freetype to 2.6.1

third_party/freetype/include/freetype/fttrigon.h

Index: third_party/freetype/include/freetype/fttrigon.h
diff --git a/third_party/freetype/include/fttrigon.h b/third_party/freetype/include/freetype/fttrigon.h
similarity index 98%
rename from third_party/freetype/include/fttrigon.h
rename to third_party/freetype/include/freetype/fttrigon.h
index 9c7b54324e4b4d48aaeee43e30a7686ec244127c..485ec5158744d449b05a9b21ca4b5fe7efcf47f5 100644
--- a/third_party/freetype/include/fttrigon.h
+++ b/third_party/freetype/include/freetype/fttrigon.h
@@ -4,7 +4,7 @@
 /*                                                                         */
 /*    FreeType trigonometric functions (specification).                    */
 /*                                                                         */
-/*  Copyright 2001, 2003, 2005, 2007, 2013 by                              */
+/*  Copyright 2001-2015 by                                                 */
 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
 /*                                                                         */
 /*  This file is part of the FreeType project, and may only be used,       */
@@ -225,8 +225,8 @@ FT_BEGIN_HEADER
    *
    * @description:
    *   Return the unit vector corresponding to a given angle.  After the
-   *   call, the value of `vec.x' will be `sin(angle)', and the value of
-   *   `vec.y' will be `cos(angle)'.
+   *   call, the value of `vec.x' will be `cos(angle)', and the value of
+   *   `vec.y' will be `sin(angle)'.
    *
    *   This function is useful to retrieve both the sinus and cosinus of a
    *   given angle quickly.