Changed backfire toolchain info to lead to more recent gcc version

README.md

@@ -16,7 +16,7 @@ Next, build proxy for Tomato with:
 ```
 make tomato
 ```
-For OpenWRT firmware (http://openwrt.org) you can find right toolchains in folders with corresponding firmware images. For example, the Backfire toolchain for Broadcom chipset can be found at http://downloads.openwrt.org/backfire/10.03.1/brcm-2.4 in the *OpenWrt-Toolchain-brcm-2.4-for-mipsel-gcc-3.4.6_uClibc-0.9.30.1.tar.bz2* archive.
+For OpenWRT firmware (http://openwrt.org) you can find right toolchains in folders with corresponding firmware images. For example, the Backfire toolchain for Broadcom chipset can be found at http://downloads.openwrt.org/backfire/10.03.1/brcm47xx/ in the *OpenWrt-Toolchain-brcm47xx-for-mipsel-gcc-4.3.3+cs_uClibc-0.9.30.1.tar.bz2* archive.
 
 Make the software with:
 ```