mips64: Add a test case for mips64.

Add a function in the memcheck/tests/leak-segv-jmp.c for MIPS64
that execute the syscall. Because we added the mips64 case we 
need to change the line number in *.exp file.
Fixes memcheck/tests/leak-segv-jmp for MIPS64.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13456 a5019735-40e9-0310-863c-91ae7b9d1cf9
mips64: Wrong address size.

On MIPS64 address of 'undefined' can be 64-bit width.
When we are trying to access that address we need to use 0x%lx
instead of 0x%x.
Fixes gdbserver_tests/mcvabits for MIPS64.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13457 a5019735-40e9-0310-863c-91ae7b9d1cf9