cgen: fix profile time on windows

[kbkpbot]

Fix issue #19130

QueryPerformanceCounter() only a counter value, it need to divide QueryPerformanceFrequency() to get real time.

As time.vpc_now() return only a counter value:

@[inline]
fn vpc_now() u64 {
	tm := u64(0)
	C.QueryPerformanceCounter(voidptr(&tm))
	return tm
}

https://learn.microsoft.com/en-us/windows/win32/sysinfo/acquiring-high-resolution-time-stamps

_{Huly®: V_0.6-21661}

[kbkpbot]

a example :
tt.v

module main
import time

fn main() {
	time.sleep(1000 * time.millisecond)
}

compile it with:

v tt.v -profile

run it and will get result:

D:\v\time>.\tt
             1          0.001ms            600ns at_exit
             1          0.014ms          13600ns _v_malloc
             1          0.014ms          13900ns memdup
             1          0.000ms            200ns gc_set_warn_proc
             1          0.024ms          24200ns is_terminal
             1          0.181ms         181500ns builtin_init
             1          0.006ms           5600ns add_vectored_exception_handler
             1          0.006ms           5600ns add_unhandled_exception_handler
             1       1002.005ms     1002004700ns time__sleep
             1       1002.010ms     1002009500ns main__main

D:\v\time>