[libc] Change the GPU loaders to LLVM executables (#101442)

Summary:
I am going to rework these tools to just me LLVM tools. This patch is
pretty much NFC to set up the CMake for that.

Author: jhuber6

libc/utils/gpu/loader/CMakeLists.txt

@@ -4,6 +4,8 @@ target_include_directories(gpu_loader PUBLIC
   ${CMAKE_CURRENT_SOURCE_DIR}
   ${LIBC_SOURCE_DIR}/include
   ${LIBC_SOURCE_DIR}
+  ${LLVM_MAIN_INCLUDE_DIR}
+  ${LLVM_BINARY_DIR}/include)
 )
 
 find_package(hsa-runtime64 QUIET 1.2.0 HINTS ${CMAKE_INSTALL_PREFIX} PATHS /opt/rocm)

libc/utils/gpu/loader/amdgpu/CMakeLists.txt

@@ -1,4 +1,11 @@
-add_executable(amdhsa-loader Loader.cpp)
+set(LLVM_LINK_COMPONENTS
+  BinaryFormat
+  Object
+  Option
+  Support
+  )
+
+add_llvm_executable(amdhsa-loader amdhsa-loader.cpp)
 
 target_link_libraries(amdhsa-loader
   PRIVATE

libc/utils/gpu/loader/amdgpu/Loader.cpp renamed to libc/utils/gpu/loader/amdgpu/amdhsa-loader.cpp

@@ -1,15 +1,15 @@
-add_executable(nvptx-loader Loader.cpp)
+set(LLVM_LINK_COMPONENTS
+  BinaryFormat
+  Object
+  Option
+  Support
+  )
+
+add_llvm_executable(nvptx-loader nvptx-loader.cpp)
 
-if(NOT LLVM_ENABLE_RTTI)
-  target_compile_options(nvptx-loader PRIVATE -fno-rtti)
-endif()
-target_include_directories(nvptx-loader PRIVATE
-                           ${LLVM_MAIN_INCLUDE_DIR} ${LLVM_BINARY_DIR}/include)
 target_link_libraries(nvptx-loader
   PRIVATE
   gpu_loader
   llvmlibc_rpc_server
   CUDA::cuda_driver
-  LLVMObject
-  LLVMSupport
 )