* Update sensors.conf for 7050QX-32 and 7050QX-32S
These two platforms were using a previous version of a kernel driver.
The new one names the i2c buses differently.
We therefore need to rename them here.
* Fix the default minigraph for the 7050QX-32S
The interface offset is invalid which makes sonic-cfggen generate an
invalid config_db.jon in rc.local.
This config then silently makes orchagent/syncd fail.
* Use the partition on which sonic-aboot.swi is
Instead of always assuming /mnt/flash, use the partition where the image
to be installed lies.
This allow for the image to be on any partition.
