> +PYTHON3_NUMPY_VERSION        := 1.16.1
> +PYTHON3_NUMPY_MD5    := bddcc682669b4be438db5eab61aa39b5
> +PYTHON3_NUMPY                := Numpy-$(PYTHON3_NUMPY_VERSION)
> +PYTHON3_NUMPY_SUFFIX := tar.gz
> +PYTHON3_NUMPY_URL    := https://github.com/numpy/numpy/archive/v$(PYTHON3_NUMPY_VERSION).$(PYTHON3_NUMPY_SUFFIX)
> +PYTHON3_NUMPY_SOURCE := $(SRCDIR)/$(PYTHON3_NUMPY).$(PYTHON3_NUMPY_SUFFIX)
> +PYTHON3_NUMPY_DIR    := $(BUILDDIR)/$(PYTHON3_NUMPY)
> +PYTHON3_NUMPY_LICENSE        := BSD

While you're at it, please add at least one file and MD5 sum to the
PYTHON3_NUMPY_LICENSE_FILES variable. And according to LICENSE.txt,
there are also files under different licenses in the source tree, these
licenses should be added here as well.