Add llvm-driver to the list of toolchain tools (#123083)

If LLVM_TOOL_LLVM_DRIVER_BUILD is enabled, make sure
LLVM_TOOLCHAIN_TOOLS includes llvm-driver, otherwise with
LLVM_INSTALL_TOOLCHAIN_ONLY will install an invalid toolchain

Co-authored-by: Andarwinux <[email protected]>

Author: Andarwinux

llvm/cmake/modules/AddLLVM.cmake

@@ -1472,6 +1472,9 @@ if(NOT LLVM_TOOLCHAIN_TOOLS)
   if (LLVM_ENABLE_LIBXML2)
     list(APPEND LLVM_TOOLCHAIN_TOOLS llvm-mt)
   endif()
+  if (LLVM_TOOL_LLVM_DRIVER_BUILD)
+    list(APPEND LLVM_TOOLCHAIN_TOOLS llvm-driver)
+  endif()
 endif()
 
 macro(llvm_add_tool project name)