freetype: bump to 2.4.6

Security update.

Signed-off-by: Frederic Bassaler <frederic.bassaler@gmail.com>
Acked-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/freetype/freetype.mk

@@ -3,7 +3,7 @@
 # freetype
 #
 #############################################################
-FREETYPE_VERSION = 2.4.4
+FREETYPE_VERSION = 2.4.6
 FREETYPE_SITE = http://$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/sourceforge/freetype
 FREETYPE_SOURCE = freetype-$(FREETYPE_VERSION).tar.bz2
 FREETYPE_INSTALL_STAGING = YES