pixman: bump version to 0.33.6

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/pixman/pixman.hash

@@ -1,2 +1,2 @@
-# From http://lists.x.org/archives/xorg-announce/2015-October/002644.html
-sha1	dff77cd08412b33ab0294057ade93e401c8a9302	pixman-0.33.4.tar.bz2
+# From http://lists.x.org/archives/xorg-announce/2015-December/002666.html
+sha1   11e93fed35deb9c89347e7a7da3060e5e5c89412	pixman-0.33.6.tar.bz2

package/pixman/pixman.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-PIXMAN_VERSION = 0.33.4
+PIXMAN_VERSION = 0.33.6
 PIXMAN_SOURCE = pixman-$(PIXMAN_VERSION).tar.bz2
 PIXMAN_SITE = http://xorg.freedesktop.org/releases/individual/lib
 PIXMAN_LICENSE = MIT