Resident Segments was not being correctly parsed because the regexp
changed.
Testing: I do not think memory reporting has testcases. We keep the old
output intact (i.e., resident) while adding the new output
`resident-according-to-smaps` which was previously evaluated to an empty
vector on linux. Other targets always return the empty vector.
Signed-off-by: Narfinger <Narfinger@users.noreply.github.com>
So far the memory reporter aggregates reports from all processes, and
runs the system reporter only in the main process. Instead it is
desirable to have per-process reports. We do so by:
- creating a ProcessReports struct that holds includes the pid in
addition to the reports themselves.
- running the system memory reporter also in content processes.
- updating the about:memory page to create one report per process, and
add useful information like the pid and the urls loaded in a given
process.
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<!-- Thank you for contributing to Servo! Please replace each `[ ]` by
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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors

Signed-off-by: webbeef <me@webbeef.org>