Adding MIPS-specific wrapper for syscall pipe.

Syscall pipe returns two descriptors in two registers, and thus a generic
Linux wrapper is not sufficient. This fixes none/tests/fdleak_pipe.
MIPS port is currently tracked as bug #270777.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12655 a5019735-40e9-0310-863c-91ae7b9d1cf9
1 file changed