build_system/ninja: add local target directory to includes

Signed-off-by: Rafael Silva <perigoso@riseup.net>

Author: perigoso

build_system/ninja.py

@@ -120,6 +120,8 @@ def write_variables(
         self.writer.variable('c_flags', details.c_flags)
         self.writer.variable('c_include_flags', [
             f'-I{self.path(self._location.code)}'
+        ] + [
+            f'-I{self.path(self._location.code / "targets" / self._target.name)}'
         ] + [
             f'-include {self.path(path)}' for path in details.include_files
         ] + [