[toolchain/uClibc]: replace the mips64 fixes patch with an upstream commit

The current one broke all other 64 bit targets.. DOH!

Signed-off-by: Imre Kaloz <kaloz@openwrt.org>



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38889 3c298f89-4303-0410-b956-a3cf2f4a3e73