Enable the following syscalls: sys_eventfd2 sys_symlinkat sys_renameat
sys_fstatfs sys_fsync sys_clock_getres sys_sched_getaffinity
sys_shmget sys_fadvise64


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13855 a5019735-40e9-0310-863c-91ae7b9d1cf9
More test cases:
xtn,xtn2
ushr 8h, 8h, #imm



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13856 a5019735-40e9-0310-863c-91ae7b9d1cf9