mips32: Add two syscall wrappers:
4345 __NR_process_vm_readv
4346 __NR_process_vm_writev
Code style, no functional changes.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13577 a5019735-40e9-0310-863c-91ae7b9d1cf9