VG_(bzero_inline): handle up to 12 words inline.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13772 a5019735-40e9-0310-863c-91ae7b9d1cf9
Minor notes on arm64 register usages.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13773 a5019735-40e9-0310-863c-91ae7b9d1cf9
Initial implementation of CFI based stack unwinding for arm64-linux.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13774 a5019735-40e9-0310-863c-91ae7b9d1cf9