python-bcrypt: correct the RDEPENDS to work on a minimal python install

Signed-off-by: Derek Straka <derek@asterius.io>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-python/recipes-devtools/python/python-bcrypt.inc

@@ -11,5 +11,8 @@ inherit pypi
 
 RDEPENDS_${PN}_class-target += "\
     ${PYTHON_PN}-cffi \
+    ${PYTHON_PN}-ctypes \
+    ${PYTHON_PN}-shell \
     ${PYTHON_PN}-six \
+    ${PYTHON_PN}-subprocess \
 "