The "source" command isn't accepted by ASH; easy to fix.
Failures with "-e" are harder to fix.  Remove the "-e"
(for now) and force bash, for safety.

Un-obfuscate the release steps, by using names instead
of numbers.  Comment the version-number manipulation.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

Runs the release.sh script in a freshly cloned repository, charting
one hypothetical future of OpenOCD's lineage.