Bug#56895 part 2 of 2: Backport of revid holyfoot@mysql.com-20100825135522-8wrjjmvh2u2t0qo6 from mysql-5.5.
Without this patch mysqlhotcopy tests would fail due to not finding the mysqlhotcopy tool in release-like builds.
With this patch the tests would either pass, or fail due to missing Perl modules (see 56817).
Text conflict in mysql-test/mysql-test-run.pl:
 - resolved by using logic from 5.5 to find mysqlhotcopy, the intention of this backport. Changed bindir to basedir.