Lint against invalid POSIX symbol definitions

[Urgau]

This PR extends the invalid_runtime_symbol_definitions and suspicious_runtime_symbol_definitions lints to lint againts the following POSIX symbols:

• I/O: open, read, write, close
• Alloc: malloc, realloc, free
• Program: exit

This is meant to address the multiple reports of users tripping over std symbols:

• Why does #[no_mangle] fn open() {} make cargo t hang?
• Pointer becomes misaligned in test with no_mangle

Those symbols are defined in std, so as long as the std crate is imported (and we are on a UNIX-like target) we lint on those symbols.

Follow up to #155521

[rustbot]

r? @chenyukang

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[rustbot]

miri is developed in its own repository. If possible, consider making this change to rust-lang/miri instead.

cc @rust-lang/miri