python-flit-scm: Add new host-only package

From the README:

A PEP 518 build backend that uses setuptools_scm to generate a version
file from your version control system, then flit_core to build the
package.

Signed-off-by: Jeffery To <jeffery.to@gmail.com>
(cherry picked from commit bbc9b14470)

lang/python/python-flit-scm/Makefile

@@ -0,0 +1,56 @@
+#
+# Copyright (C) 2023 Jeffery To
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=python-flit-scm
+PKG_VERSION:=1.7.0
+PKG_RELEASE:=1
+
+PYPI_NAME:=flit-scm
+PYPI_SOURCE_NAME:=flit_scm
+PKG_HASH:=961bd6fb24f31bba75333c234145fff88e6de0a90fc0f7e5e7c79deca69f6bb2
+
+PKG_LICENSE:=MIT
+PKG_LICENSE_FILES:=LICENSE
+PKG_MAINTAINER:=Jeffery To <jeffery.to@gmail.com>
+
+PKG_HOST_ONLY:=1
+HOST_BUILD_DEPENDS:= \
+	python3/host \
+	python-build/host \
+	python-installer/host \
+	python-flit-core/host \
+	python-setuptools-scm/host \
+	python-tomli/host
+
+include ../pypi.mk
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/host-build.mk
+include ../python3-package.mk
+include ../python3-host-build.mk
+
+define Package/python3-flit-scm
+  SECTION:=lang
+  CATEGORY:=Languages
+  SUBMENU:=Python
+  TITLE:=A PEP 518 build backend that uses setuptools_scm and flit
+  URL:=https://gitlab.com/WillDaSilva/flit_scm
+  DEPENDS:=+python3-light +python3-flit-core +python3-setuptools-scm +python3-tomli
+  BUILDONLY:=1
+endef
+
+define Package/python3-flit-scm/description
+A PEP 518 build backend that uses setuptools_scm to generate a version
+file from your version control system, then flit_core to build the
+package.
+endef
+
+$(eval $(call Py3Package,python3-flit-scm))
+$(eval $(call BuildPackage,python3-flit-scm))
+$(eval $(call BuildPackage,python3-flit-scm-src))
+$(eval $(call HostBuild))