valgrind: update 0003-mips-replace-addi-with-addiu.patch

valgrind: update 0003-mips-replace-addi-with-addiu.patch

This patch has been updated in the upstream bug report, so let's update
it in Buildroot as well. It will fix the build issue for mips64r6:

m_dispatch/dispatch-mips64-linux.S:199: Error: opcode not supported on
this processor: mips64r6 (mips64r6) `daddi $13,$13,8'

Fixes:

  http://autobuild.buildroot.net/results/6ca/6ca3a31d1542fbbb44238e296565b40d6afcd5fa/

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>