[code coverage] Switch order of coverage and test results merge scripts

This CL switches the invocation order of coverage merger and test
results merger so that test results merger is invoked after coverage
merger, otherwise, some test results merger such as layout tests will
treat the coverage dumps as test results json files and try to merge
them, which will result in errors.

Bug: 923711
Change-Id: Idd890781081643e4bb790e424e6382d32e78f72e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1601412
Reviewed-by: Stephen Martinis <martiniss@chromium.org>
Reviewed-by: Roberto Carrillo <robertocn@chromium.org>
Commit-Queue: Yuke Liao <liaoyuke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#657815}
1 file changed