Basic GDB 7.6 support

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24030 3ad0048d-3df7-0310-abae-a5850022a9f2
 * Add moe information about libgdb.a and examples from tests directory

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24031 3ad0048d-3df7-0310-abae-a5850022a9f2