Add exp file for tc20_verifywrap due to different errno values on MIPS.

Add exp file for tc20_verifywrap due to different errno values on MIPS.

Different error numbers on MIPS require us to add an extra exp file for this
test. EDEADLK is 45 on MIPS (and not 35), and EOPNOTSUPP is 122 (and not 95).
Furthermore, sem_post will pass due to different implementation on MIPS (in
comparison to x86_64), and thus one error less has to be reported in the log.

This fixes helgrind/tests/tc20_verifywrap.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12998