boost: backport python3 import fix (#20301)

var/spack/repos/builtin/packages/boost/boost_218.patch

@@ -0,0 +1,10 @@
+--- a/libs/python/src/numpy/numpy.cpp
++++ b/libs/python/src/numpy/numpy.cpp
+@@ -19,6 +19,7 @@ static void wrap_import_array()
+ static void * wrap_import_array()
+ {
+   import_array();
++  return NULL;
+ }
+ #endif
+

var/spack/repos/builtin/packages/boost/package.py

@@ -256,6 +256,10 @@ def libs(self):
     # See https://github.com/boostorg/build/pull/154
     patch('boost_154.patch', when='@:1.63.99')
 
+    # Backport Python3 import problem
+    # See https://github.com/boostorg/python/pull/218
+    patch('boost_218.patch', when='@:1.67.99')
+
     def patch(self):
         # Disable SSSE3 and AVX2 when using the NVIDIA compiler
         if self.spec.satisfies('%nvhpc'):