Added GDB tests to build system.

	* Makefile.am: Added GDB tests.
	* aclocal.m4: Regenerated.
	* configure: Regenerated.
	* configure.ac: Added GDB tests.
	* src/gdb-all-types/Makefile.am: Corrected canonical name.
	* src/gdb-anon/anon.c: Corrected typo.