CMake: Adapt to changed compiler-rt libs base dir with LLVM 16

CMakeLists.txt

@@ -782,7 +782,11 @@ else()
 endif()
 set(LDC_INSTALL_LLVM_RUNTIME_LIBS ${LDC_INSTALL_LLVM_RUNTIME_LIBS_DEFAULT} CACHE BOOL "Copy/install LLVM compiler-rt libraries (ASan, libFuzzer, ...) from LLVM/Clang into LDC lib dir when available.")
 function(copy_compilerrt_lib llvm_lib_name ldc_lib_name fixup_dylib)
-    set(llvm_lib_path ${LLVM_LIBRARY_DIRS}/clang/${LLVM_VERSION_BASE_STRING}/lib/${llvm_lib_name})
+    if(LDC_LLVM_VER LESS 1600)
+        set(llvm_lib_path ${LLVM_LIBRARY_DIRS}/clang/${LLVM_VERSION_BASE_STRING}/lib/${llvm_lib_name})
+    else()
+        set(llvm_lib_path ${LLVM_LIBRARY_DIRS}/clang/${LLVM_VERSION_MAJOR}/lib/${llvm_lib_name})
+    endif()
     if(EXISTS ${llvm_lib_path})
         message(STATUS "--  - ${llvm_lib_path} --> ${ldc_lib_name}")
         set(ldc_lib_path ${PROJECT_BINARY_DIR}/lib${LIB_SUFFIX}/${ldc_lib_name})