dependencies/llvm: strip default include dirs also for config-tool version

This should have been done in my earlier fix, but kinda forgot to test and
fix it there as well.

See #11733 for the discussion.

Fixes: 8284be8 ("dependencies/llvm: strip default include dirs")
Signed-off-by: Karol Herbst <kherbst@redhat.com>

Author: karolherbst

mesonbuild/dependencies/dev.py

@@ -232,6 +232,7 @@ def __init__(self, name: str, environment: 'Environment', kwargs: T.Dict[str, T.
 
         cargs = mesonlib.OrderedSet(self.get_config_value(['--cppflags'], 'compile_args'))
         self.compile_args = list(cargs.difference(self.__cpp_blacklist))
+        self.compile_args = strip_system_includedirs(environment, self.for_machine, self.compile_args)
 
         if version_compare(self.version, '>= 3.9'):
             self._set_new_link_args(environment)