python-vcversioner: add RDEPENDS for the package

Signed-off-by: Derek Straka <derek@asterius.io>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-python/recipes-devtools/python/python-vcversioner_2.16.0.0.bb

@@ -17,4 +17,8 @@ do_install_append() {
     install -m 0644 ${S}/vcversioner*.egg ${D}/${PYTHON_SITEPACKAGES_DIR}/
 }
 
+RDEPENDS_${PN} += "\
+    ${PYTHON_PN}-subprocess \
+    "
+
 BBCLASSEXTEND = "native"