[LLVM] Fix llvm-gpu-loader use in standalone

Author: RossComputerGuy

cmake/Modules/FindLibcCommonUtils.cmake

@@ -7,7 +7,7 @@
 #===--------------------------------------------------------------------===//
 
 if(NOT TARGET llvm-libc-common-utilities)
-  set(libc_path ${CMAKE_CURRENT_LIST_DIR}/../../libc)
+  set(libc_path ${LLVM_MAIN_SRC_DIR}/../libc)
   if (EXISTS ${libc_path} AND IS_DIRECTORY ${libc_path})
     add_library(llvm-libc-common-utilities INTERFACE)
     # TODO: Reorganize the libc shared section so that it can be included without

llvm/tools/CMakeLists.txt

@@ -9,7 +9,7 @@
 # traversing each directory.
 create_llvm_tool_options()
 
-if(NOT LLVM_COMPILER_IS_GCC_COMPATIBLE)
+if(NOT LLVM_COMPILER_IS_GCC_COMPATIBLE OR NOT TARGET llvm-libc-common-utilities)
   set(LLVM_TOOL_LLVM_GPU_LOADER_BUILD OFF)
 endif()