dovecot.m4: Run valgrind with --trace-children=yes Some of the unit tests are run via shell and we want to check the unit tests instead of just the shell.
dovecot.m4: Run valgrind with --trace-children=yes
Some of the unit tests are run via shell and we want to check the unit tests
instead of just the shell.

dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot