There are a couple of pot-holes in the road currently with canvas
development on linux. Add some troubleshooting info to help
with permissions errors that might be encountered.
Test Plan:
Absolutely nothing.
Change-Id: I987f31f59e3a887df396713dc2db604240c563c7
Reviewed-on: https://gerrit.instructure.com/67070
Reviewed-by: Adam Ard <aard@instructure.com>
Product-Review: Adam Ard <aard@instructure.com>
QA-Review: Adam Ard <aard@instructure.com>
Tested-by: Adam Ard <aard@instructure.com>