fix hipsycl-rocm-git build process

[sobc]

I've applied a patch to address the _no such file or directory error that
occurred during the SPIRV-LLVM-Translator fetch process, which was causing
issues with build file generation. Additionally, this patch correctly sets the
runtime path for the installed library.

Furthermore, due to some naming conflicts within the project, I've adjusted the
name to _AdaptiveCpp without making any changes to the package name.

To ensure proper functionality when using the acpp compiler, I've added lld
as a dependency.

It's worth noting that the tagged version of hipsycl-rocm doesn't require
these changes, but unfortunately, it doesn't compile correctly. This issue lies
with the developers of AdaptiveCpp, so I haven't made any modifications to the
PKGBUILD yet. We'll need to wait for the next tagged version to address this
problem.