polarssl: fix download URL

Switch to a non-redirect download URL to fix:
http://autobuild.buildroot.net/results/ec3/ec340fffa6eebb18a0746097419359b44c557a90/
Thanks go to Paul Bakker for the quick response!

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/polarssl/polarssl.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-POLARSSL_SITE = https://polarssl.org/download
+POLARSSL_SITE = https://polarssl.org/code/releases
 POLARSSL_VERSION = 1.2.8
 POLARSSL_SOURCE = polarssl-$(POLARSSL_VERSION)-gpl.tgz
 POLARSSL_CONF_OPT = \