Remove linkloader from frameworks/rs.

Bug: 18322681

Now that we have switched completely to the new shared library object
loading path, we can safely remove the legacy linkloader path.

In frameworks/rs, this removes the actual linkloader code, as well as
all helper calls into linkloader. This change also coalesces code paths
between the support library version of RS and the native version of RS,
since they both now depend on a similar shared library loader. A missing
call to dlclose() on Script teardown is also added on the native library
path.

Change-Id: Ie5cc152d93f5e75383f7c21a4523579cfae8823f
59 files changed