Make Helgrind test cases build on arm64-linux.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13878 a5019735-40e9-0310-863c-91ae7b9d1cf9
Update.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13879 a5019735-40e9-0310-863c-91ae7b9d1cf9