tests/lint: run lint1 tests in one fell swoop

This generates fewer details in the ATF test reports, as the
platform-specific tests that are skipped are not mentioned individually.

tests/lint: enforce diagnostics to be listed in chronologic order

While here, fix the tests on uchar platforms.

tests/lint: sort diagnostics in ilp32 tests chronologically

tests/lint: sort multiple diagnostics per line chronologically

For now, the chronologic order is not enforced but has to be established
manually, for example by removing all 'expect' comment lines a

tests/lint: sort multiple diagnostics per line chronologically

For now, the chronologic order is not enforced but has to be established
manually, for example by removing all 'expect' comment lines and
regenerating them with 'accept.sh -u'.

While here, clean up a few instances that came up when regenerating the
'expect' comments, such as wrong indentation or needless deviation from
the 'expect+1' form.

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tests/lint: test integer constants in different language levels

tests/lint: test parsing of preprocessing directives

tests/lint: fix a few ilp32 tests

tests/lint: automate accepting changed test results

tests/lint: ensure consistent preprocessor filenames in tests

The deviations often happen when copying or renaming tests.

lint: clean up typos

tests/lint: fix preprocessor line number validation

When running the tests via ATF, the filename was an absolute filename,
while the preprocessing line in the test file uses a relative filename.
The

tests/lint: fix preprocessor line number validation

When running the tests via ATF, the filename was an absolute filename,
while the preprocessing line in the test file uses a relative filename.
These two didn't match.

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tests/lint: add quotes around placeholders in a few messages

tests/lint: move check-expect.lua to tests/lint1

It is only used for testing lint1, not for lint2 or xlint.