[LinkerWrapper] Switch to add_clang_tool() macro

[foutrelis]

Summary

This creates install-clang-linker-wrapper{,-stripped} targets which are
useful for Linux distro builds when using LLVM_DISTRIBUTION_COMPONENTS.

Fixes: https://bugs.archlinux.org/task/77814

[jhuber6]

I forget why this used add_clang_executable in the first place. I think I copied it from somewhere else and forgot to change it.

[jhuber6]

Do you need someone to land this for you?

[foutrelis]

In D145862#4187915, @jhuber6 wrote:

Do you need someone to land this for you?

Yes, please. Thank you. :)

clang/tools/clang-linker-wrapper/CMakeLists.txt

-include(GNUInstallDirs)
-
 set(LLVM_LINK_COMPONENTS
   ${LLVM_TARGETS_TO_BUILD}
   BitWriter
   Core
   BinaryFormat
   MC
   Target
   TransformUtils

 set(LLVM_TARGET_DEFINITIONS LinkerWrapperOpts.td)
 tablegen(LLVM LinkerWrapperOpts.inc -gen-opt-parser-defs)
 add_public_tablegen_target(LinkerWrapperOpts)
 
 if(NOT CLANG_BUILT_STANDALONE)
   set(tablegen_deps intrinsics_gen LinkerWrapperOpts)
 endif()
 
-add_clang_executable(clang-linker-wrapper
+add_clang_tool(clang-linker-wrapper
   ClangLinkerWrapper.cpp
   OffloadWrapper.cpp
 
   DEPENDS
   ${tablegen_deps}
   )
 
 set(CLANG_LINKER_WRAPPER_LIB_DEPS
   clangBasic
   )
 
 target_link_libraries(clang-linker-wrapper
   PRIVATE
   ${CLANG_LINKER_WRAPPER_LIB_DEPS}
   )
-
-install(TARGETS clang-linker-wrapper RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")