Modify Uno "lock" bits in boards.txt to make bootloader readable by

WestfW · damellis · commit 61e4d16675ad · 2011-10-10T12:11:17.000-04:00
sketches. Part of http://code.google.com/p/arduino/issues/detail?id=554 (cherry picked from commit 39a4966)
diff --git a/hardware/arduino/boards.txt b/hardware/arduino/boards.txt
@@ -10,7 +10,7 @@ uno.bootloader.extended_fuses=0x05
 uno.bootloader.path=optiboot
 uno.bootloader.file=optiboot_atmega328.hex
 uno.bootloader.unlock_bits=0x3F
-uno.bootloader.lock_bits=0x0F
+uno.bootloader.lock_bits=0x2F
 uno.build.mcu=atmega328p
 uno.build.f_cpu=16000000L
 uno.build.core=arduino
