ardupilotwaf: fix ESP32 memory zero comment

Followup to PR #29005 (d9e5f2d).

Tools/ardupilotwaf/boards.py

@@ -1068,6 +1068,7 @@ def expand_path(p):
         env.CXXFLAGS.remove('-Werror=shadow')
 
         # wrap malloc to ensure memory is zeroed
+        # note that this also needs to be done in the CMakeLists.txt files
         env.LINKFLAGS += ['-Wl,--wrap,malloc']
 
         # TODO: remove once hwdef.dat support is in place
@@ -1399,7 +1400,6 @@ def configure_env(self, cfg, env):
         ]
 
         # wrap malloc to ensure memory is zeroed
-        # note that this also needs to be done in the CMakeLists.txt files
         env.LINKFLAGS += ['-Wl,--wrap,malloc']
 
         if cfg.options.force_32bit: