Improve ergonomics for Address Sanitizer

[Shnatsel]

Running Address Sanitizer, the go-to memory debugger, currently requires multiple workarounds:

• All sanitizers are botched in the default build mode, you need to force rustc to use gold linker as a workaround (Regression on nightly since LLVM 8 upgrade: thread sanitizer doesn't compile anymore rust-lang/rust#53945)
• ASAN produces "ODR violation" false positives which can be suppressed through the ASAN options mechanism (AddressSanitizer: odr-violation with zero size rust-lang/rust#41807)

This is a pretty bad state to be in, especially since this tooling is a requirement for detecting exploitable bugs in unsafe code.

[Shnatsel]

The activity hub for sanitizers in Rust seems to be https://github.com/japaric/rust-san