toolchain-external: Update Sourcery CodeBench MIPS toolchain

Update to the latest update for the 2013.05 toolchain
released on 11 September 2013.

https://sourcery.mentor.com/GNUToolchain/release2554

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

toolchain/toolchain-external/ext-tool.mk

@@ -246,7 +246,7 @@ TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/mips-l
 TOOLCHAIN_EXTERNAL_SOURCE = mips-2012.09-99-mips-linux-gnu-i686-pc-linux-gnu.tar.bz2
 else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS201305),y)
 TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/mips-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = mips-2013.05-36-mips-linux-gnu-i686-pc-linux-gnu.tar.bz2
+TOOLCHAIN_EXTERNAL_SOURCE = mips-2013.05-66-mips-linux-gnu-i686-pc-linux-gnu.tar.bz2
 else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII201305),y)
 TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/nios2-linux-gnu/
 TOOLCHAIN_EXTERNAL_SOURCE = sourceryg++-2013.05-43-nios2-linux-gnu-i686-pc-linux-gnu.tar.bz2