Update bundled freetype to 2.6.1

third_party/freetype/include/freetype/internal/ftcalc.h

Index: third_party/freetype/include/freetype/internal/ftcalc.h
diff --git a/third_party/freetype/include/internal/ftcalc.h b/third_party/freetype/include/freetype/internal/ftcalc.h
similarity index 96%
rename from third_party/freetype/include/internal/ftcalc.h
rename to third_party/freetype/include/freetype/internal/ftcalc.h
index 14ec37b9cd1b7e2cb708883a9465982228df128f..67ade7e5f947c986315eb2b8c3ccbd3bbb00c4be 100644
--- a/third_party/freetype/include/internal/ftcalc.h
+++ b/third_party/freetype/include/freetype/internal/ftcalc.h
@@ -4,7 +4,7 @@
 /*                                                                         */
 /*    Arithmetic computations (specification).                             */
 /*                                                                         */
-/*  Copyright 1996-2006, 2008, 2009, 2012-2014 by                          */
+/*  Copyright 1996-2015 by                                                 */
 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
 /*                                                                         */
 /*  This file is part of the FreeType project, and may only be used,       */
@@ -300,6 +300,18 @@ FT_BEGIN_HEADER
 
 
   /*
+   *  This function normalizes a vector and returns its original length.
+   *  The normalized vector is a 16.16 fixed-point unit vector with length
+   *  close to 0x10000.  The accuracy of the returned length is limited to
+   *  16 bits also.  The function utilizes quick inverse square root
+   *  approximation without divisions and square roots relying on Newton's
+   *  iterations instead.
+   */
+  FT_BASE( FT_UInt32 )
+  FT_Vector_NormLen( FT_Vector*  vector );
+
+
+  /*
    *  Return -1, 0, or +1, depending on the orientation of a given corner.
    *  We use the Cartesian coordinate system, with positive vertical values
    *  going upwards.  The function returns +1 if the corner turns to the