CVS log for src/tests/usr.bin/xlint/lint1/Attic/platform_int.exp

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tests/lint: remove .exp files, as they have become redundant

Now that each lint1 test lists all generated diagnostics as 'expect'
comments, the information from the .exp files is no longer needed.  The
only information that gets lost is the order of the diagnostics, which
is mostly relevant for paired messages like 'inconsistent definition' +
'previous definition was here'.

tests/lint: explain difference between i386 and sparc for 259

Seen in usr.bin/make/cond.c 1.278 from 2021-09-21, line 800, the call to
is_token, where unsigned char gets converted to unsigned int or unsigned
long, depending on the platform.

tests/lint: add tests for platform characteristics

Running lint in usr.bin/make on i386 fails due to this warning:

cond.c(800): warning: argument #3 is converted from 'unsigned char' to
    'unsigned int' due to prototype [259]

This warning only occurred on i386 but not on sparc or x86_64. Try to
reproduce the test situation in platform_int.

The platform code in t_integration.sh was not strict enough, it didn't
check for multiple conditions, such as in msg_132_ilp32. That test was
only supposed to run on ILP32 platforms where size_t is unsigned int. It
also ran on sparc, even though size_t is long there.