Address PR review comments

- phc.c: invert the _MSC_VER condition so the POSIX include block comes
  first (#ifndef _MSC_VER), with the MSVC shim under #else.
- README: fix the "On Windows." heading to use a tab like other headings
  instead of 4 spaces.

Per review on openwall/yescrypt PR #11.

Author: quadcpu

README

@@ -124,7 +124,7 @@ of output.
 We do most of our testing on Linux systems with gcc.  The supplied
 Makefile assumes that you use gcc.
 
-    On Windows.
+	On Windows.
 
 A PowerShell script, build.ps1, is provided to build yescrypt with the
 MSVC toolchain.  It requires Visual Studio Community 2026 with the

phc.c

@@ -52,7 +52,10 @@ int PHS(void *out, size_t outlen, const void *in, size_t inlen,
 
 #ifdef TEST
 #include <stdio.h>
-#ifdef _MSC_VER
+#ifndef _MSC_VER
+#include <unistd.h> /* for sysconf() */
+#include <sys/times.h>
+#else
 /*
  * MSVC lacks the POSIX <unistd.h> and <sys/times.h> interfaces used for timing
  * below.  Provide a minimal Win32-based shim; the timing it produces is only
@@ -102,9 +105,6 @@ static clock_t times(struct tms *buf)
 	QueryPerformanceCounter(&now);
 	return (clock_t)(now.QuadPart * 1000 / freq.QuadPart);
 }
-#else
-#include <unistd.h> /* for sysconf() */
-#include <sys/times.h>
 #endif
 
 static void print_hex(const uint8_t *buf, size_t buflen, const char *sep)