mips: atomic_add_8bit and atomic_add_16bit for MIPS64-BE

It fixes memcheck/tests/atomic_incs on MIPS64-BE.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13399 a5019735-40e9-0310-863c-91ae7b9d1cf9
1 file changed