back to msvc as the default C ABI on Windows

Zig provides a libc for the GNU C ABI on Windows, and cannot (at least
yet) provide one for the MSVC C ABI. However when not linking libc,
zig has no problem targeting MSVC as the C ABI. And this should be the
default.

Related: #2911
95e04e3874Andrew Kelley committed on 7/17/2019, 4:40:48 PMparentd64bd30
1 file changedLine totals unavailable