python-ply: restore as a host-only package

The libcamera Mojom parser imports PLY directly. Restore the package for
host builds so libcamera can declare it as a build dependency instead
of installing it through pip.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

lang/python/python-ply/Makefile

@@ -0,0 +1,45 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=python-ply
+PKG_VERSION:=3.11
+PKG_RELEASE:=1
+
+PYPI_NAME:=ply
+PKG_HASH:=00c7c1aaa88358b9c765b6d3000c6eec0ba42abca5351b095321aef446081da3
+
+PKG_LICENSE:=BSD-3-Clause
+PKG_LICENSE_FILES:=README.md
+PKG_MAINTAINER:=Daniel Golle <daniel@makrotopia.org>
+
+PKG_HOST_ONLY:=1
+HOST_BUILD_DEPENDS:= \
+	python3/host \
+	python-setuptools/host \
+	python-build/host \
+	python-installer/host \
+	python-wheel/host
+
+include ../pypi.mk
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/host-build.mk
+include ../python3-package.mk
+include ../python3-host-build.mk
+
+define Package/python3-ply
+  SECTION:=lang
+  CATEGORY:=Languages
+  SUBMENU:=Python
+  TITLE:=lex and yacc for Python
+  URL:=https://www.dabeaz.com/ply/
+  DEPENDS:=+python3-light
+  BUILDONLY:=1
+endef
+
+define Package/python3-ply/description
+  PLY is a 100% Python implementation of the common parsing tools lex and yacc.
+endef
+
+$(eval $(call Py3Package,python3-ply))
+$(eval $(call BuildPackage,python3-ply))
+$(eval $(call BuildPackage,python3-ply-src))
+$(eval $(call HostBuild))