Add some missing dependencies to obmc-flash-bmc

A couple new python modules were added to bmc_update.py.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/common/recipes-phosphor/obmc-phosphor-flash/obmc-flash-bmc.bb b/meta-phosphor/common/recipes-phosphor/obmc-phosphor-flash/obmc-flash-bmc.bb
index 80bd1bf..3c41220 100644
--- a/meta-phosphor/common/recipes-phosphor/obmc-phosphor-flash/obmc-flash-bmc.bb
+++ b/meta-phosphor/common/recipes-phosphor/obmc-phosphor-flash/obmc-flash-bmc.bb
@@ -9,6 +9,8 @@
         python-compression \
         python-shell \
         python-pygobject \
+        python-subprocess \
+        python-io \
         pyphosphor \
         "