Add description of TEST_USE_LONGLOG

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@29049 3ad0048d-3df7-0310-abae-a5850022a9f2
 Add AIX support, do not add gdbver to targets

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@29050 3ad0048d-3df7-0310-abae-a5850022a9f2