In the future, tests may rely on debug symbols being present in
notmuch, so we plan to switch the default flags.
The main purpose of this test is to help explain the perhaps
mysterious failures of other tests which rely on symbols being
present.
- The old test was quite impossible to debug; the new one shows the difference
between the two directories, if any.
- "repository" doesn't make sense for out of tree builds. Or tarball
builds, for that matter.
All test scripts to be executed are now named as T\d\d\d-name.sh,
numers in increments of 10.
This eases adding new tests and developers to see which are test scripts
that are executed by test suite and in which order.