toolchain/crosstool-ng: update to 1.13.4

Update to fix downloads from sourceforge (the 'mesh' network
no longer works).

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/crosstool-ng/crosstool-ng.mk

@@ -1,4 +1,4 @@
-CROSSTOOL_NG_VERSION           = 1.13.3
+CROSSTOOL_NG_VERSION           = 1.13.4
 CROSSTOOL_NG_SOURCE            = crosstool-ng-$(CROSSTOOL_NG_VERSION).tar.bz2
 CROSSTOOL_NG_SITE              = http://crosstool-ng.org/download/crosstool-ng/
 CROSSTOOL_NG_INSTALL_STAGING   = NO