Fix java.lang.UnsatisfiedLinkError error.

Fix java.lang.UnsatisfiedLinkError error.

Change shared library name from libandroidterm to libandroidterm2

My theory is that this bug is happening on systems that have
system versions of the libandroidterm shared library.

Version 1.0.26 of Android Terminal Emulator added a new API,
hangupProcessGroup, to the libandroidterm library.

I think on devices that have libandroidterm in their system library,
that version takes precedence over the version in the application,
and so the hangupProcessGroup API is not found.

By changing the name of the libandroidterm library to libandroidterm2
we should avoid loading the system version of the
libandroidterm library.