Arduino rolled back the version of avrdude that they used but we were
always using the latest version.
Show the arduino package first in the list of Platforms to Add.
Turn on the Arduino Neon site for future updates.
Conflicts:
toolchains/arduino/org.eclipse.cdt.arduino-feature/p2.inf
Change-Id: I0392594d7e9d30daeb6c9e4ca7090a92dde8b19f
(cherry picked from commit 32bc90f8bf)
