drd: Add strncpy() and strncmp() intercepts (#326816)

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13705 a5019735-40e9-0310-863c-91ae7b9d1cf9
drd: Add three additional strncpy() and strncmp() intercepts (#326816)

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13706 a5019735-40e9-0310-863c-91ae7b9d1cf9