Made test-unit run in parlallel. This was achived by having all aria tests that uses temporary files to create the temporary file in an unique tempdirectory.
aria_chk now returns 1 if one got any warnings during check and 2 if one got errors.
lp:728919 maria_chk should fail on all detected corruptions

mysql-test/lib/My/SafeProcess.pm:
  Removed ^M lines from the file
storage/maria/ma_check.c:
  Fixed indentation
storage/maria/maria_chk.c:
  aria_chk now returns 1 if one got any warnings during check and 2 if one got errors.
storage/maria/unittest/ma_control_file-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_maria_log_cleanup.c:
  Added help function create_tmpdir()
storage/maria/unittest/ma_pagecache_consist.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_pagecache_rwconsist.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_pagecache_rwconsist2.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_pagecache_single.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_all-t:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler_first_lsn-t.c:
  Use unique sub directory for test results
  remove delete of files that are already deleted by maria_log_remove()
storage/maria/unittest/ma_test_loghandler_max_lsn-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler_multigroup-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler_multithread-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler_noflush-t.c:
  Use unique sub directory for test results
  remove delete of files that are already deleted by maria_log_remove()
storage/maria/unittest/ma_test_loghandler_nologs-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler_pagecache-t.c:
  Use unique sub directory for test results
  remove delete of files that are already deleted by maria_log_remove()
storage/maria/unittest/ma_test_loghandler_purge-t.c:
  Use unique sub directory for test results
support-files/compiler_warnings.supp:
  Supress some warnings
unittest/unit.pl:
  Run 4 unittests in parallel