Fixed the LLVM build script CMake invocation to work with recent LLVM/Clang revisions.

This fixes the dreaded CMake error:

CMake Error at tools/clang/tools/clang-offload-bundler/CMakeLists.txt:18 (add_dependencies):
  Cannot add target-level dependencies to non-existent target "clang".

build/scripts/LLVM.lua

@@ -233,7 +233,6 @@ function cmake(gen, conf, builddir, options)
  		.. ' -DCLANG_TOOL_C_ARCMT_TEST_BUILD=false'
  		.. ' -DCLANG_TOOL_C_INDEX_TEST_BUILD=false'
  		.. ' -DCLANG_TOOL_DIAGTOOL_BUILD=false'
- 		.. ' -DCLANG_TOOL_DRIVER_BUILD=false'
  		.. ' -DCLANG_TOOL_LIBCLANG_BUILD=false'
  		.. ' -DCLANG_TOOL_SCAN_BUILD_BUILD=false'
  		.. ' -DCLANG_TOOL_SCAN_VIEW_BUILD=false'