python-pymongo: split the package into bson and original pymongo package

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

meta-python/recipes-devtools/python/python3-pymongo_3.5.1.bb

@@ -2,7 +2,7 @@ inherit pypi setuptools3
 require python-pymongo.inc
 
 # Requires _pydecimal which is in misc
-RDEPENDS_${PN} += " \
+RDEPENDS_${PYTHON_PN}-bson += " \
     ${PYTHON_PN}-enum \
     ${PYTHON_PN}-misc \
     ${PYTHON_PN}-selectors \