example/gitignore: update with all generated examples

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

examples/.gitignore

+/82559_eeprom
 /hello_world
 /interrupt
+/mem_to_mem_idma2intr
+/test_burst
+/timer
 /sched
 /smc91111_eeprom
 *.bin