drd: Fix a 4x slowdown for certain applications (#316181)

This commit reverts r12629 ("drd: Don't sporadically report false positives on
newly allocated memory. Fixes #297147").


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13315 a5019735-40e9-0310-863c-91ae7b9d1cf9
drd: Fix stack growth tracking. Hopefully this is the proper fix for #297147.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13316 a5019735-40e9-0310-863c-91ae7b9d1cf9
s390: Distribute dfp-1 expected output files also if built on a non-s390 platform

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13317 a5019735-40e9-0310-863c-91ae7b9d1cf9