unit-test: Find all test-suite.log

This removes the hard coding of the test-suite.log reading logic so that
autotools test-suite logs can be in any output build directory.

Tested:
    Added a test failure to sdbusplus and logs are still printed out
    correctly when the failure occurs. Successful runs are not printed.

Change-Id: I85fcc7d99b34bcaa5fcc398052844410047367d2
Signed-off-by: William A. Kennington III <wak@google.com>
1 file changed