PRE(sys_openat): when checking whether ARG1 == VKI_AT_FDCWD, be sure
only to check the lowest 32 bits, since that arg is a file descriptor
-- hence "int" -- and checking all 64 bits fails unexpectedly if ARG1
and VKI_AT_FDCWD are not both zero- or sign- extended.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14689 a5019735-40e9-0310-863c-91ae7b9d1cf9
Adds initial support for AArch64 (arm64) on Android.  Small programs
(/system/bin/ls, /system/bin/date) run.  Still to do:

* enable more malloc/free intercepts

* enable wrappers for ashmem and binder syscalls

* check to see if any special ioctl support is required for ARM Mali GPUs



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14690 a5019735-40e9-0310-863c-91ae7b9d1cf9