Write protect bootloader after "Burn bootloader" command.

Fix #124

CHANGELOG

@@ -4,6 +4,7 @@ SAMD CORE 1.6.5
 * Bootloader: Fixed wrong UART speed (regression)
 * Fixed incorrect return value from Wire.available() when the receive buffer is not fully read.
 * Added DAC0 definition in Arduino/Genuino Zero variant file.
+* Enabled bootloader protection after "Burn bootloader".
 
 SAMD CORE 1.6.4 2016.02.19
 

platform.txt

@@ -139,5 +139,5 @@ tools.openocd.erase.pattern=
 
 tools.openocd.bootloader.params.verbose=-d2
 tools.openocd.bootloader.params.quiet=-d0
-tools.openocd.bootloader.pattern="{path}/{cmd}" {bootloader.verbose} -s "{path}/share/openocd/scripts/" -f "{runtime.platform.path}/variants/{build.variant}/{build.openocdscript}" -c "telnet_port disabled; init; halt; at91samd bootloader 0; program {{{runtime.platform.path}/bootloaders/{bootloader.file}}} verify reset; shutdown"
+tools.openocd.bootloader.pattern="{path}/{cmd}" {bootloader.verbose} -s "{path}/share/openocd/scripts/" -f "{runtime.platform.path}/variants/{build.variant}/{build.openocdscript}" -c "telnet_port disabled; init; halt; at91samd bootloader 0; program {{{runtime.platform.path}/bootloaders/{bootloader.file}}} verify; at91samd bootloader 8192; reset; shutdown"