Make improvements

- Make rand64() thread safe
- Introduce lemur64 lcg prng
- Improve strace on New Technology
- Improve msync() on New Technology

libc/calls/fdatasync-nt.c

@@ -22,10 +22,5 @@
 
 textwindows int sys_fdatasync_nt(int fd) {
   if (!__isfdkind(fd, kFdFile)) return ebadf();
-  /*
-   * XXX: On Windows NT this might be more analagous to fflush() and
-   *      Microsoft docs say to do manual block i/o for database-ish
-   *      guarantees on disk persistence. Consider: Really good UPS.
-   */
-  return FlushFileBuffers(g_fds.p[fd].handle) ? 0 : __winerr();
+  return FlushFileBuffers(g_fds.p[fd].handle) ? 0 : -1;
 }