bug#71422: no easy way to generate a test-suite.log without skipped tests

[Karl Berry]

    Here is a patch that allows the package maintainer to eliminate the
    SKIPped test logs, thus making test-suite.log more useful: either
    by running
      make check IGNORE_SKIPPED_LOGS=1
    or by defining in the Makefile (or Makefile.am):
      IGNORE_SKIPPED_LOGS = 1

Thanks Bruno. I installed this (with minor wording tweaks). -k