Add new EBB testcases

This patch adds new EBB testcases

	* Makefile.am: Add new testcases.
	* Makefile.in: Regenerate.
	* ebb.c: Add new functions.
	* paf/ebb.h: Add new functions.
	* tests/test_ebb_child.c: New file.
	* tests/test_ebb_clear_on_close.c: New file.
	* tests/test_ebb_nohandler.c: New file.