[clang] [libclc] [libclc] Rework libclc naming convention to use the triple (PR #177465)

[Wenju He via cfe-commits]

================
@@ -419,8 +393,7 @@ function(add_libclc_builtin_set)
     endif()
   else()
     # Non-SPIR-V targets add an extra step to optimize the bytecode
-    set( obj_suffix ${ARG_ARCH_SUFFIX}.bc )
-    set( libclc_builtins_lib ${LIBCLC_OUTPUT_LIBRARY_DIR}/${obj_suffix} )
+    set( libclc_builtins_lib ${LIBCLC_OUTPUT_LIBRARY_DIR}/${ARG_TRIPLE}/${LIBCLC_OUTPUT_FILENAME}.bc )
----------------
wenju-he wrote:

need to pass CPU to function add_libclc_builtin_set and change below path:
```suggestion
    set( libclc_builtins_lib ${LIBCLC_OUTPUT_LIBRARY_DIR}/${ARG_TRIPLE}/${ARG_CPU}/${LIBCLC_OUTPUT_FILENAME}.bc )
```


https://github.com/llvm/llvm-project/pull/177465