[aur-general] delete llvm-amdgpu-svn & lib32-llvm-amdgpu-svn

[Lone_Wolf]

llvm-amdgpu-svn (1) & lib32-llvm-amdgpu-svn (2) were needed to build
mesa-git master versions.
llvm 3.3 is now in the official repos and built with amdgpu / R600 enabled
and mesa-git master builds fine against that version, so these 2 packages
are no longer needed.

Please delete (1) and (2) .

(1) https://aur.archlinux.org/packages/llvm-amdgpu-svn/
(2) https://aur.archlinux.org/packages/lib32-llvm-amdgpu-svn/