[PATCH 2/3] mingw: replace MSVCRT's fstat() with a Win32-based implementation

From: Karsten Blees fstat() is the only stat-related CRT function for which we don't have a full replacement yet (and thus the only reason to stick with MSVCRT's 'struct stat' definition). Fully implement fstat(), in preparation of implementing a POSIX 2013 compatible 'struct stat' with

[PATCH 3/3] mingw: implement nanosecond-precision file times

From: Karsten Blees We no longer use any of MSVCRT's stat-functions, so there's no need to stick to a CRT-compatible 'struct stat' either. Define and use our own POSIX-2013-compatible 'struct stat' with nanosecond- precision file times. Note: This can cause performance issues when using Git