Install systemd service files

Install the systemd service as part of the pyproject installation
process.

Signed-off-by: Christopher Obbard <christopher.obbard@linaro.org>

Author: obbardc

pyproject.toml

@@ -21,6 +21,17 @@ authors = [
 Homepage = "https://github.com/brgl/gpiod-sysfs-proxy"
 Issues = "https://github.com/brgl/gpiod-sysfs-proxy/issues"
 
+[tool.setuptools.data-files]
+"lib/systemd/system" = [
+  "share/gpiod-sysfs-proxy.service",
+  "share/run-gpio-sys.mount",
+  "share/sys-class.mount",
+]
+"lib/systemd/system/sysinit.target.wants" = [
+  "share/sysinit.target.wants/run-gpio-sys.mount",
+  "share/sysinit.target.wants/sys-class.mount",
+]
+
 [build-system]
 requires = ["setuptools", "wheel"]
 build-backend = "setuptools.build_meta"