LLVM's ORCv2 JIT API, used by the LLVMJIT.cpp file, is causing some
issues for Fuchsia and potentially some Android build. Temporarily bring
back the ORCv1 version of LLVMJIT to unblock them.

Bug: b/171897980
Bug: chromium:1140854
Change-Id: I3465bba20fe36fb9d276acfa993e3593ef10a07d
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/49688Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>