Support defining test program metadata from the Makefiles.

Introduce a new, per-test-program TEST_METADATA.<program> variable that
contains a list of key/value paris describing metadata properties for
that test program.  These properties are later written into the
auto-generated Kyuafile when using the KYUAFILE=auto functionality.

This is to avoid having to supply hand-crafted Kyuafiles when the needs
for metadata overrides are trivial.

While doing this, and because I am documenting TEST_METADATA, take the
chance to document the TEST_INTERFACE setting as well.

MFC after:	5 days

0 files changed, 0 insertions, 0 deletions