Support ASAN on Windows with MSVC

[nielsdos]

Description

Very nasty surprise: --enable-sanitizer silently doesn't do anything when using a VS toolchain on Windows instead of a Clang toolchain. I had to patch the configure script manually to add the necessary flags.

[iluuu1994]

Did you get it to work? I tried back when we migrated from AppVeyor to GitHub, but I ran into various issues.

[nielsdos]

I've used it to debug a mysqlnd Windows bug a few days ago and it works, but I don't run all extensions when debugging Windows bugs. I could imagine opcache issues but I haven't tried that yet.

[cmb69]

See #6964 for an unfinished attempt; maybe that can be somewhat helpful.

[iluuu1994]

@cmb69 It's great to have you back! I don't remember the details (and the log is gone now) but I think the failures I referenced were the same ones you observed:

I'm getting a lot of 0xc0000028 (STATUS_BAD_STACK, i.e. "An invalid or unaligned stack was encountered during an unwind operation."), e.g. for Zend/tests/030.phpt. I think this is bogus, but I wouldn't know how to suppress it (note that this is from MSVC, not from ASan).

[nielsdos]

This has been fixed already