Fix bootloader tools for .org boards

Author: facchinm

boards.txt

@@ -246,7 +246,7 @@ mzero_pro_bl_dbg.build.pid=0x804f
 mzero_pro_bl_dbg.build.preferred_out_format=hex
 mzero_pro_bl_dbg.bootloader.size=0x4000
 
-mzero_pro_bl_dbg.bootloader.tool=openocd
+mzero_pro_bl_dbg.bootloader.tool=openocd-withbootsize
 mzero_pro_bl_dbg.bootloader.cmd_unprotect=at91samd bootloader 0
 mzero_pro_bl_dbg.bootloader.cmd_protect=at91samd bootloader 16384
 mzero_pro_bl_dbg.bootloader.cmd_protect_verify=at91samd bootloader
@@ -284,7 +284,8 @@ mzero_pro_bl.build.pid=0x804f
 mzero_pro_bl.build.preferred_out_format=hex
 mzero_pro_bl.bootloader.size=0x4000
 mzero_pro_bl.build.emu.mcu=atmega2560
-mzero_pro_bl.bootloader.tool=avrdude
+mzero_pro_bl.bootloader.tool=openocd-withbootsize
+mzero_pro_bl.bootloader.file=mzero/Bootloader_D21_M0_Pro_150427.hex
 mzero_pro_bl.bootloader.low_fuses=0xff
 
 ######################################################
@@ -319,8 +320,9 @@ mzero_bl.build.pid=0x804e
 mzero_bl.build.preferred_out_format=hex
 mzero_bl.bootloader.size=0x4000
 mzero_bl.build.emu.mcu=atmega2560
-mzero_bl.bootloader.tool=avrdude
+mzero_bl.bootloader.tool=openocd-withbootsize
 mzero_bl.bootloader.low_fuses=0xff
+mzero_bl.bootloader.file=mzero/Bootloader_D21_M0_150515.hex
 
 ######################################################
 #ARDUINO TIAN (WITH) BOOTLOADER