Added support for building for tvOS

This change is just to add support for building for tvOS.
It is exactly the same as iOS, just using a different SDK.

I had to change the two lines for libjpeg-turbo so that
it will run for both tvOS and iOS.

BUG=skia:

Change-Id: I6ae5fc4257df74c0f321e5d2d71584f6a52ec3a6
Reviewed-on: https://skia-review.googlesource.com/9660
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Mike Klein <mtklein@chromium.org>
diff --git a/AUTHORS b/AUTHORS
index 376ffd5..f4b36aa 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -26,6 +26,7 @@
 Jeff Muizelaar <jmuizelaar@mozilla.com>
 Lee Salzman <lsalzman@mozilla.com>
 Marcin Kazmierczak <mar.kazmierczak@gmail.com>
+Matthew Leibowitz <mattleibow@live.com>
 MIPS <*@imgtec.com>
 NVIDIA <*@nvidia.com>
 Opera Software ASA <*@opera.com>