This change makes it possible to build SwiftShader against llvm-10 on
Android. To enable this, the root Android.bp must be modified to depend
on libLLVM10_swiftshader, which will be done in a separate change.

Successfully built for arm, arm64, x86, and x64 with the following lunch
configs:
* blueline-userdebug
* aosp_x86-eng
* aosp_x86_64-eng

Bug: b/152339534
Change-Id: Id70f16f1dbde313bb97763d8a10a73a92c3530c9
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/46289
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>