tests/helper-runtests.sh

dirstate-v2: Store unsigned integers inside DirstateEntry

The negative marker values are not used anymore.

Differential Revision: https://phab.mercurial-scm.org/D11634

#
# Avoid interference from actual test env:

unset HGTEST_JOBS
unset HGTEST_TIMEOUT
unset HGTEST_PORT
unset HGTEST_SHELL