ERFA lib support request

[trufanov-nok]

Would be great to have a script for building ERFA library

[trufanov-nok]

It seems I'm able to fit erfa into mxe with following erfa.mk:

# This file is part of MXE. See LICENSE.md for licensing information.

PKG             := erfa
$(PKG)_WEBSITE  := https://github.com/liberfa/erfa
$(PKG)_DESCR    := Essential Routines for Fundamental Astronomy
$(PKG)_IGNORE   :=
$(PKG)_VERSION  := 2.0.1
$(PKG)_SUBDIR   := erfa-$($(PKG)_VERSION)
$(PKG)_FILE     := erfa-$($(PKG)_VERSION).tar.xz
$(PKG)_URL      := https://github.com/liberfa/erfa/releases/download/v$($(PKG)_VERSION)/$($(PKG)_FILE)
$(PKG)_CHECKSUM := 45111f0addf6ef69345aaf093bd054705b41ac2db7541dd3f0e105362c8e20e4
$(PKG)_DEPS     := cc meson-wrapper

define $(PKG)_BUILD
    '$(MXE_MESON_WRAPPER)' $(MXE_MESON_OPTS) \
        '$(BUILD_DIR)' '$(SOURCE_DIR)'
    '$(MXE_NINJA)' -C '$(BUILD_DIR)' -j '$(JOBS)'
    '$(MXE_NINJA)' -C '$(BUILD_DIR)' -j '$(JOBS)' install
endef