python3-cython: upgrade 0.29.20 -> 0.29.21

(From OE-Core rev: 7899bbe61963b4f998fcd63c83620751713b8efb)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python3-cython_0.29.21.bb

@@ -0,0 +1,18 @@
+inherit setuptools3
+require python-cython.inc
+
+RDEPENDS_${PN} += "\
+    python3-setuptools \
+"
+
+# running build_ext a second time during install fails, because Python
+# would then attempt to import cythonized modules built for the target
+# architecture.
+DISTUTILS_INSTALL_ARGS += "--skip-build"
+
+do_install_append() {
+    # rename scripts that would conflict with the Python 2 build of Cython
+    mv ${D}${bindir}/cython ${D}${bindir}/cython3
+    mv ${D}${bindir}/cythonize ${D}${bindir}/cythonize3
+    mv ${D}${bindir}/cygdb ${D}${bindir}/cygdb3
+}