When I conceived commit dc1d0880b0, I
thought it would be a good idea to build test-data files, including
the phony guest images, during the 'make' phase. Previously these
were built early in the 'make check' phase.
However this has two disadvantages: (a) We run the appliance
unnecessarily during builds. For example, it is not necessary to
build the phony guests if we are going to do an 'installcheck'.
(b) Even if we are testing, the critical first time we run the
appliance is not in 'quickcheck' or 'tests/qemu', but some random
guest build.
Reorder the build sequence to fix this, and also a few other things.
This updates commit dc1d0880b0.
Create a new top-level directory called test-data, which will carry
all the test data which is large and/or shared between multiple tests.
There are actually several new subdirectories created:
test-data/binaries: The pre-built binary and library files for random
architectures that we use to test various architecture detection
features (was part of tests/data).
test-data/blank-disks: The blank disks which are used for disk format
detection (was part of tests/data).
test-data/files: Other miscellaneous test files from tests/data that
are not included in the above.
test-data/phony-guests: The phony guests (was tests/guests).
test-data: The top-level directory builds the 'test.iso' image file
that is used for testing the C API and in miscellaneous other tests.
