Check HTML module import order in presubmit
Check HTML module import order in presubmit

This patch adds a function to catapult_build/html_checks.py which checks
that all affected files have correct import order.

Sample output:

Invalid "import" link sort order in tracing/tracing/value/value_test.html:
    /tracing/base/utils.html
  + /tracing/value/numeric.html
    /tracing/value/unit.html
  - /tracing/value/numeric.html
    /tracing/value/value.html

Review URL: https://codereview.chromium.org/1723973002

catapult-project/catapult-csm,catapult-project/catapult,catapult-project/catapult-csm,catapult-project/catapult,catapult-project/catapult-csm,catapult-project/catapult,benschmaus/catapult,benschmaus/catapult,sahiljain/catapult,benschmaus/catapult,catapult-project/catapult-csm,catapult-project/catapult,catapult-project/catapult-csm,catapult-project/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,SummerLW/Perf-Insight-Report,sahiljain/catapult,sahiljain/catapult,SummerLW/Perf-Insight-Report,benschmaus/catapult,SummerLW/Perf-Insight-Report,catapult-project/catapult,SummerLW/Perf-Insight-Report,sahiljain/catapult,sahiljain/catapult,benschmaus/catapult,sahiljain/catapult,catapult-project/catapult,benschmaus/catapult,SummerLW/Perf-Insight-Report,benschmaus/catapult,SummerLW/Perf-Insight-Report