[Minor] Do not use lld when clang is not the compiler...

cmake/Toolset.cmake

@@ -78,7 +78,15 @@ find_program(GOLD_PATH NAMES "ld.gold" "gold")
 
 if(NOT LINKER_NAME)
     if(LLD_PATH)
-        set(LINKER_NAME "lld")
+        if (COMPILER_CLANG)
+            set(LINKER_NAME "lld")
+        else()
+            if(GOLD_PATH)
+                set(LINKER_NAME "gold")
+            else()
+                message(STATUS "Use generic 'ld' as a linker")
+            endif()
+        endif()
     elseif(GOLD_PATH)
         set(LINKER_NAME "gold")
     else()