Enable a few more syscalls:
sys_setpriority, sys_getpriority, sys_getresuid,
sys_getresgid, sys_recvfrom, sys_readahead


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13840 a5019735-40e9-0310-863c-91ae7b9d1cf9
Fill in a (very) few cases for get_otrack_shadow_offset_wrk on arm64.
Apparently needed for generating some kinds of error messages, even
when not doing origin tracking, strangely enough.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13841 a5019735-40e9-0310-863c-91ae7b9d1cf9
wire up some more system calls on s390


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13842 a5019735-40e9-0310-863c-91ae7b9d1cf9