Fix output summary error of tools/runner/runner.js when the Status of last test tested is not 'PASS'
with the Subtest Pass Rate of last test being 'x/y' (the value of y is larger than 1).
Optimize creating 'status_arr' arrary with darobin's suggestion.
Merge pull request #891 from BruceDai/fix_output_summary

Fix output summary error of tools/runner/runner.js when the Status of la...