Merge r13703 rom 3_9_BRANCH (Add Maran Pakkirisamy.)


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13722 a5019735-40e9-0310-863c-91ae7b9d1cf9
Merge r13704 from 3_9_BRANCH (Fix compile problem in
memcheck/tests/reach_thread_register.c)


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13723 a5019735-40e9-0310-863c-91ae7b9d1cf9