Fix header installations

Author: WillAyd

python/pyarrow/meson.build

@@ -370,6 +370,7 @@ py.install_sources(
         'src/arrow/python/async.h',
         'src/arrow/python/benchmark.h',
         'src/arrow/python/common.h',
+        'src/arrow/python/config.h',
         'src/arrow/python/csv.h',
         'src/arrow/python/datetime.h',
         'src/arrow/python/decimal.h',
@@ -394,6 +395,7 @@ py.install_sources(
         'src/arrow/python/python_to_arrow.h',
         'src/arrow/python/type_traits.h',
         'src/arrow/python/udf.h',
+        'src/arrow/python/util.h',
         'src/arrow/python/visibility.h',
     ),
     subdir: 'pyarrow/include/arrow/python',