libgtk3: bump to version 3.20.8

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libgtk3/libgtk3.hash

@@ -1,2 +1,2 @@
-# From http://ftp.gnome.org/pub/gnome/sources/gtk+/3.20/gtk+-3.20.6.sha256sum
-sha256	3f8016563a96b1cfef4ac9e795647f6316deb2978ff939b19e4e4f8f936fa4b2	gtk+-3.20.6.tar.xz
+# From http://ftp.gnome.org/pub/gnome/sources/gtk+/3.20/gtk+-3.20.8.sha256sum
+sha256	9841bd9b4d23c045c474b10fdde9da958af904b63783701e796391d55d4396f3	gtk+-3.20.8.tar.xz

package/libgtk3/libgtk3.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 LIBGTK3_VERSION_MAJOR = 3.20
-LIBGTK3_VERSION = $(LIBGTK3_VERSION_MAJOR).6
+LIBGTK3_VERSION = $(LIBGTK3_VERSION_MAJOR).8
 LIBGTK3_SOURCE = gtk+-$(LIBGTK3_VERSION).tar.xz
 LIBGTK3_SITE = http://ftp.gnome.org/pub/gnome/sources/gtk+/$(LIBGTK3_VERSION_MAJOR)
 LIBGTK3_LICENSE = LGPLv2+