python3-rlp: new package

Add a recipe for rlp: a Python implementation of Recursive Length
Prefix encoding (RLP).

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-core/packagegroups/packagegroup-meta-python.bb

@@ -372,6 +372,7 @@ RDEPENDS:packagegroup-meta-python3 = "\
     python3-rfc3339-validator \
     python3-rfc3986-validator \
     python3-rfc3987 \
+    python3-rlp \
     python3-robotframework \
     python3-robotframework-seriallibrary \
     python3-rsa \