do not skip unittests for Win64

std.stdio: set text translation mode in rawRead/Write
std.digest.sha: disable SSSE3 for SHA because it has unsupported calling convention
std.format, std.math: workarounds for different behaviour of sprintf
std.conv: workarounds for different behaviour of strtold
std.math: disable unittests for exp2f and exp2l
std.datetime: add "Libya Standard Time"
std.process: seek to end of file before trying to append to it from another process
std.process: do not try to terminate an invalid process handle

win64.mak: disable COMDAT folding for release build

Win64: fix lrint(real), disable tmpfile test